What is the significance of atomic number in the modern classification of elements?

What is the significance of atomic number in the modern classification of

elements?
by

1 Answer

Answer :

In the modern classification, elements are arranged in the increasing order of their atomic

numbers.
by

Related questions

The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively. a) Calculate the average atomic mass of elements X and Z. b) How is the average atomic mass of elements X and Z compare with the atomic mass of element Y? c) Which law of classification of elements is illustrated by this example? d) Give another example of a set of elements which are classified according to this law.

Description : The atomic masses of three elements X, Y and Z having similar chemical properties are 7, 23 and 39 respectively. a) Calculate the average atomic mass of elements X and Z. b) How is the ... this example? d) Give another example of a set of elements which are classified according to this law.

Last Answer : a) The average atomic mass of X and Z = 7 39 2 46 2 23 b) The average atomic mass of X and Z is equal to the atomic mass of Y c) The law illustrated in this example is Dobereiner’s law of triads. d) Another example of Dobereiner’s law is Calcium, Strontium and Barium.

Interpretation means (a) Explanation of meaning and significance of the data in Financial Statements. (b) Concerned with preparation and presentation of classified data (c) Systematic analysis of recorded data (d) Methodical classification of data given in Financial Statements

Description : Interpretation means (a) Explanation of meaning and significance of the data in Financial Statements. (b) Concerned with preparation and presentation of classified data (c) Systematic analysis of recorded data (d) Methodical classification of data given in Financial Statements

Last Answer : (a) Explanation of meaning and significance of the data in Financial Statements.

Hawthorne studies have underlined the significance of which of the following ? (A) System approach to management (B) Contingency approach to management (C) Modern approach to management (D) Human relations approach to management.

Description : Hawthorne studies have underlined the significance of which of the following ? (A) System approach to management (B) Contingency approach to management (C) Modern approach to management (D) Human relations approach to management.

Last Answer : Answer: Human relations approach to management.

Who is the man responsible for devising the modern science classification system?

Description : Who is the man responsible for devising the modern science classification system?

Last Answer : Need answer

An important criterion for modern day classification is (a) resemblances in morphology (b) anatomical and physiological traits (c) breeding habits (d) presence or absence of notochord.

Description : An important criterion for modern day classification is (a) resemblances in morphology (b) anatomical and physiological traits (c) breeding habits (d) presence or absence of notochord.

Last Answer : (b) anatomical and physiological traits

Why was the system of classification of elements into triads not found suitable? -Science

Description : Why was the system of classification of elements into triads not found suitable? -Science

Last Answer : it is because all the elements discovered at that time could not be classified into triads.

The elements of the third period of the Periodic Table are given below: periodic-classification-of-elements-chapter-wise-important-questions-class-10-science-1 (a) Which atom is bigger, Na or Mg? Why? (6) Identify the most (i) metallic and (ii) non-metallic element in Period 3. -Science

Description : The elements of the third period of the Periodic Table are given below: periodic-classification-of-elements-chapter-wise-important-questions-class-10-science-1 (a) Which atom is bigger, Na or Mg? Why? (6) Identify the most (i) metallic and (ii) non-metallic element in Period 3. -Science

Last Answer : (a) Sodium is bigger than magnesium as it has lesser nuclear charge so there is less force of attraction between nucleus and valence electrons and less effective nuclear charge. It is, therefore, ... the most non-metallic element because it can gain electrons easily due to its smallest atomic size.

According to Newland’s classification of elements, the properties of sulphur are similar to those of oxygen because sulphur is the

Description : According to Newland’s classification of elements, the properties of sulphur are similar to those of oxygen because sulphur is the

Last Answer : eighth element starting from oxygen

First attempt of classification of elements was made by

Description : First attempt of classification of elements was made by

Last Answer : Dobereiner.c

What was the Mendeleev’s basis for classification of elements?

Description : What was the Mendeleev’s basis for classification of elements?

Last Answer : Mendeleev’s classification is based on atomic mass.

Give reason: Classification of elements as metals and non-metals is justified but not satisfactory.

Description : Give reason: Classification of elements as metals and non-metals is justified but not satisfactory.

Last Answer : Classification of elements as metals and non-metals is justified because there are more common characteristics in both the groups but it is not satisfactory because each metal or non-metal have completely different properties.

Give reason: Classification of elements on the basis of states of matter cannot be justified.

Description : Give reason: Classification of elements on the basis of states of matter cannot be justified.

Last Answer : Classification on the basis of states of matter cannot be justified because for example bromine and mercury are liquids at room temperature, they cannot be placed in the same group.

What is the need for periodic classification of elements?

Description : What is the need for periodic classification of elements?

Last Answer : When elements are classified such that they have the same properties, study of large number of elements is reduced to study of few groups of elements.

Ch 5 – Periodic Classification of Elements

Description : Ch 5 – Periodic Classification of Elements

Last Answer : Ch 5 – Periodic Classification of Elements notes

where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification information?

Description : where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification information?

Last Answer : When derivatively classifying information, where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification ... InformationDoD 5220.22-M, National Industrial Security Program Operating Manual (NISPOM)

When derivatively classifying information, where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification information?

Description : When derivatively classifying information, where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification information?

Last Answer : When derivatively classifying information, where can you find a listing of specific information elements that identify their classification, reason for classification, downgrading, and declassification ... InformationDoD 5220.22-M, National Industrial Security Program Operating Manual (NISPOM)

Name the scientists who made the classification of elements in the nineteenth century.

Description : Name the scientists who made the classification of elements in the nineteenth century.

Last Answer : Name the scientists who made the classification of elements in the nineteenth century.

What was the basis of classification of elements before the knowledge of electronic structure of atom?

Description : What was the basis of classification of elements before the knowledge of electronic structure of atom?

Last Answer : What was the basis of classification of elements before the knowledge of electronic structure of atom?

Explain the Mendeleev’s Law of classification of elements also describe advantages & disadvantages of his periodic table.

Description : Explain the Mendeleev’s Law of classification of elements also describe advantages & disadvantages of his periodic table.

Last Answer : Ans : Mendeleeve's Law of Classification : Mendeleeve in 1869 arrange elements in order of increasing atomic masses. He placed chemically similar elements vertically beneath each other & concluded that : The ... metals. No Idea Of Atomic Structure : It failed to give the idea of atomic structure.

Name the 5 elements of the periodic classification wh comprise the Carbon Group.

Description : Name the 5 elements of the periodic classification wh comprise the Carbon Group.

Last Answer : ANSWER: CARBON, SILICON, GERMANIUM, TIN AND LEAD

What is the modern standard for rela- tive atomic mass?

Description : What is the modern standard for rela- tive atomic mass?

Last Answer : Carbon isotope with mass number 12

The modern atomic mass scale is based on :-

Description : The modern atomic mass scale is based on :-

Last Answer : The modern atomic mass scale is based on :- A. `C^(12)` B. `o^(16)` C. `H^(1)` D. `C^(13)`

In the modern quantum-based atomic theory what is the name given to a particular space around the nucleus in which an electron moves?

Description : In the modern quantum-based atomic theory what is the name given to a particular space around the nucleus in which an electron moves?

Last Answer : The name given to a particular space around the nucleus in whichan electron moves is Orbital

In the modern quantum-based atomic theory what is the name given to a particular space around the nucleus in which an electron moves?

Description : In the modern quantum-based atomic theory what is the name given to a particular space around the nucleus in which an electron moves?

Last Answer : The name given to a particular space around the nucleus in whichan electron moves is Orbital

What are the main postulates of Modern Atomic Theory.

Description : What are the main postulates of Modern Atomic Theory.

Last Answer : Ans : Modern Atomic Theory : (1) Composition : According to modern atomic theory , atom is a complex organization composed of even smaller particles called sub atomic particles e.g. electrons , ... to modern theory the ratio between atoms of various elements in many organic compounds is not simple.

The modern atomic theory was conceived by : w) Victor Grignard x) Daniel Rutherford y) Svante Arrhenius z) John Dalton

Description : The modern atomic theory was conceived by : w) Victor Grignard x) Daniel Rutherford y) Svante Arrhenius z) John Dalton

Last Answer : ANSWER: Z -- JOHN DALTON

There are two elements calcium (atomic number 20) and argon (atomic number 18) The mass number of both the elements is 40. They are therefore known as (a) isotones (b) isochores (c) isobars (d) isotopes

Description : There are two elements calcium (atomic number 20) and argon (atomic number 18) The mass number of both the elements is 40. They are therefore known as (a) isotones (b) isochores (c) isobars (d) isotopes

Last Answer : Ans:(c)

Who Classified Elements based on atomic number?

Description : Who Classified Elements based on atomic number?

Last Answer : Moseley

Elements with atomic number 89-103 are known as?

Description : Elements with atomic number 89-103 are known as?

Last Answer : Actinides (radio active rare earths)

Elements with atomic number 57-71 are known as?

Description : Elements with atomic number 57-71 are known as?

Last Answer : Lanthanides (rare earths)

Elements having same mass number and different atomic number are known as?

Description : Elements having same mass number and different atomic number are known as?

Last Answer : Isobars Eg: calcium — 40; Argon - 40

Atomic mass is not useful to construct the periodic table. Give reasons with an example. OR Why is atomic number is more useful than atomic mass to classify the elements?

Description : Atomic mass is not useful to construct the periodic table. Give reasons with an example. OR Why is atomic number is more useful than atomic mass to classify the elements?

Last Answer : Isotopes of an element have same atomic number but different atomic mass. They have to be placed in four places. This creates confusion because other elements occupied these positions.

A radioactive element A on disintegration gives two elements B and C. If B is helium and C is the element of atomic number 90 and atomic mass 234, the

Description : A radioactive element A on disintegration gives two elements B and C. If B is helium and C is the element of atomic number 90 and atomic mass 234, the

Last Answer : A radioactive element A on disintegration gives two elements B and C. If B is helium and C is the element of atomic ... )^(234)Th` D. `._(91)^(234)Pa`

Which of the atomic number represent the s-block elements ?

Description : Which of the atomic number represent the s-block elements ?

Last Answer : Which of the atomic number represent the s-block elements? a. 7, 15 b. 3, 12 c. 6, 14 d. 9, 17

How do the elements in period 4 to show the physical state of the elements changes as the atomic number increases?

Description : How do the elements in period 4 to show the physical state of the elements changes as the atomic number increases?

Last Answer : The last members are bromine (liquid) and krypton (gas).

Are the elements on the periodic table organized by their atomic number?

Description : Are the elements on the periodic table organized by their atomic number?

Last Answer : Yes. The elements are arranged in increasing order of atomic number.

What element has an atomic number lower than that of aluminum and one less valence electron than group 16 elements?

Description : What element has an atomic number lower than that of aluminum and one less valence electron than group 16 elements?

Last Answer : Nitrogen

Are the elements on the periodic table organized by their atomic number?

Description : Are the elements on the periodic table organized by their atomic number?

Last Answer : Yes. The elements are arranged in increasing order of atomic number.

Atoms of different elements have - (1) same atomic number and same electronic configuration (2) different atomic number and same eletronic configuration (3) different atomic number and different number of valence electrons (4) same number of electrons and neutrons

Description : Atoms of different elements have - (1) same atomic number and same electronic configuration (2) different atomic number and same eletronic configuration (3) different atomic number and different number of valence electrons (4) same number of electrons and neutrons

Last Answer : (3) different atomic number and different number of valence electrons Explanation: Each element's atoms have a different number of protons, neutrons, and electrons, which is why they have different ... Their reactivity also varies because of the number and activeness of the electrons in the atom.

What are isobars? (1) Elements with same atomic number but different mass number (2) Elements with different atomic number but same mass number (3) Elements with different atomic number and different mass number (4) Elements with same atomic number and same mass number

Description : What are isobars? (1) Elements with same atomic number but different mass number (2) Elements with different atomic number but same mass number (3) Elements with different atomic number and different mass number (4) Elements with same atomic number and same mass number

Last Answer : (2) Elements with different atomic number but same mass number Explanation: Isobars are atoms of different chemical elements that have the same number of n cleons. Correspondingly, isobars differ in atomic number (number of protons) but have the same mass number.

Atomic number of which of the following elements is greater than that of Fluorine? (1) Sodium (2) Beryllium (3) Nitrogen (4) Boron

Description : Atomic number of which of the following elements is greater than that of Fluorine? (1) Sodium (2) Beryllium (3) Nitrogen (4) Boron

Last Answer : (1) Sodium Explanation: Sodium has higher atomic number (11) than Fluorine (9) The atomic number of Beryllium and Nitrogen are 4 and 7 respectively.

Which of the following elements has the atomic number greater than that of Phosphorus? (1) Aluminium (2) Silicon (3) Chlorine (4) Magnesium

Description : Which of the following elements has the atomic number greater than that of Phosphorus? (1) Aluminium (2) Silicon (3) Chlorine (4) Magnesium

Last Answer : (3) Chlorine Explanation: Chlorine is a chemical element with symbol Cl and atomic number 17. Phosphorus is a chemical element with symbol P and atomic number 15.

This scientist gave the law- ‘Properties of elements are a periodic function of their atomic number.’ This property of the fundamental importance of atomic number was discovered by- (1) Johann Wolfgang Döbereiner (2) John Newlands (3) Dmitri lvanovich Mendeléev (4) Henry Moseley

Description : This scientist gave the law- ‘Properties of elements are a periodic function of their atomic number.’ This property of the fundamental importance of atomic number was discovered by- (1) Johann Wolfgang Döbereiner (2) John Newlands (3) Dmitri lvanovich Mendeléev (4) Henry Moseley

Last Answer : (4) Henry Moseley Explanation: In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental property than its atomic mass as described below.

When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as (A) Isomers (B) Isotopes (C) Isobars (D) Isotones

Description : When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as (A) Isomers (B) Isotopes (C) Isobars (D) Isotones

Last Answer : (D) Isotones

Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same (A) Period increases (B) Period decreases (C) Group increases (D) Both 'b' & 'c'

Description : Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same (A) Period increases (B) Period decreases (C) Group increases (D) Both 'b' & 'c'

Last Answer : Option D

Which one of the following best defines the word “allotropes”? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between those of metals and nonmetals D Atoms of a given atomic number that have a specific number of neutrons E The different phases (solid, liquid or gas) of a substance

Description : Which one of the following best defines the word allotropes ? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between ... a specific number of neutrons E The different phases (solid, liquid or gas) of a substance

Last Answer : A Different structural forms of an element 

Name this chemical element. The principal use of this element has been in solid-state electronic devices, notably transistors. Its position in the periodic table is in group "4A". The element's atomic number is 32 and its chemical symbol is Ge.

Description : Name this chemical element. The principal use of this element has been in solid-state electronic devices, notably transistors. Its position in the periodic table is in group "4A". The element's atomic number is 32 and its chemical symbol is Ge.

Last Answer : ANSWER: GERMANIUM

I will be describing a chemical element. Try to identify it with the fewest number of clues. This chemical element is a silver-white metal, with bluish tinge, capable of taking a high polish. T element occurs abundantly in all ordinary rocks, except limestone and sandstone; is third in abundance of the elements in the earth's crust and used to make drink cans. The atomic number of this element is 13. Name t element.

Description : I will be describing a chemical element. Try to identify it with the fewest number of clues. This chemical element is a silver-white metal, with bluish tinge, capable of taking a high polish. T element ... crust and used to make drink cans. The atomic number of this element is 13. Name t element.

Last Answer : ANSWER: ALUMINUM

1. Where do Sweat glands occur in greatest number? 2. What is the electorate for a Panchayat? 3. The cause of fractional atomic weights of elements? 4. The second largest river basin in India is of which river? 5. Which Sikh Guru called himself the ‘Sachcha Badshah’?

Description : 1. Where do Sweat glands occur in greatest number? 2. What is the electorate for a Panchayat? 3. The cause of fractional atomic weights of elements? 4. The second largest river basin in India is ... 19. Why does Mumbai receives more rainfall than Pune? 20. What was the real name of Tantiya Tope?

Last Answer : Answer : 1 1. In the skin of the armpits 2. The Gram Sabha 3. The presence of Isotopes 4. Godavari 5. Guru Hargovind 6. Friedrich Engels 7. Cooperation 8. 30 9. Krishna Basin 10. ... Birds from reptiles 18. Dr. Rajendra Prasad 19. Because mumbai is on the windward side 20. Ramchandra Panduranga

Atoms of different elements have (1) same atomic number and same electronic configuration (2) different atomic number and same eletronic configu-ration (3) different atomic number and different number of valence electrons (4) same number of electrons and neutrons

Description : Atoms of different elements have (1) same atomic number and same electronic configuration (2) different atomic number and same eletronic configu-ration (3) different atomic number and different number of valence electrons (4) same number of electrons and neutrons

Last Answer : different atomic number and different number of valence electrons