Compare the arrangement of elements in Mendeleev’s and Modern periodic table.

Compare the arrangement of elements in Mendeleev’s and Modern periodic table.
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1 Answer

Answer :

Mendeleev’s periodic table

Modern periodic table

1. Elements are arranged in the

order of increasing atomic

masses.

1. Elements are arranged

in the order of increasing

atomic numbers.
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Related questions

Iron which resembles Cobalt and Nickel in properties has been placed far away from these elements. This was one of the limitations of : (1) Modern periodic table (2) Newland's law of octaves (3) Dobereiner's triads (4) Mendeleev's periodic table

Description : Iron which resembles Cobalt and Nickel in properties has been placed far away from these elements. This was one of the limitations of : (1) Modern periodic table (2) Newland's law of octaves (3) Dobereiner's triads (4) Mendeleev's periodic table

Last Answer : (2) Newland's law of octaves Explanation: Among the major limitations of Newlands Law of Octaves, some similar elements have been separated from one another while some dissimilar elements have been placed in the same column.

Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table? (1) Scandium (2) Gallium (3) Titanium (4) Germanium

Description : Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic Table? (1) Scandium (2) Gallium (3) Titanium (4) Germanium

Last Answer : (2) Gallium

Why are isotopes not considered in Mendeleev’s periodic table?Name the elements which are predicted by Mendeleev as eka –silicon and eka –aluminum

Description : Why are isotopes not considered in Mendeleev’s periodic table?Name the elements which are predicted by Mendeleev as eka –silicon and eka –aluminum

Last Answer : Ans.Because Mendeleev gave priority to similarities in properties. Germanium and gallium

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.

State Mendeleev’s periodic law. Write two achievements of Mendeleev’s periodic table -Science

Description : State Mendeleev’s periodic law. Write two achievements of Mendeleev’s periodic table -Science

Last Answer : Mendeleevs Periodic Law: Properties of elements are the periodic function of their atomic masses. Achievements:i It could classify all the elements discovered at that time. ii It helped in the discovery of new elements. iii it helped in the correction of the atomic mass of some of the elements.

Mendeleev's periodic table was based on?

Description : Mendeleev's periodic table was based on?

Last Answer : increasing order of atomic mass

State the characteristics of Mendeleev’s periodic table.

Description : State the characteristics of Mendeleev’s periodic table.

Last Answer : 1) Mendeleev’s periodic table consists of 7 periods (horizontal) and 9 groups (vertical). 2) Elements are arranged in the increasing order of their atomic weights. 3) The elements that have similar property were placed in vertical columns.

How many stages are there in Mendeleev's Periodic Table ?

Description : How many stages are there in Mendeleev's Periodic Table ?

Last Answer : There are 7 stages in Mendeleev's Periodic Table .

What are the periods in Mendeleev's periodic table?

Description : What are the periods in Mendeleev's periodic table?

Last Answer : Because some of the elements were not yet discovered so he left them blank for other elements to be discovered. -bobby corner

What are the periods in Mendeleev's periodic table?

Description : What are the periods in Mendeleev's periodic table?

Last Answer : Because some of the elements were not yet discovered so he left them blank for other elements to be discovered. -bobby corner

Why did some of the elements did not match perfectly on Mendeleev's table?

Description : Why did some of the elements did not match perfectly on Mendeleev's table?

Last Answer : Need answer

In the modern periodic table, the elements are arranged in the ascending order of their

Description : In the modern periodic table, the elements are arranged in the ascending order of their

Last Answer : atomic number.

How many elements did Mendeleev introduce the modern periodic table ?

Description : How many elements did Mendeleev introduce the modern periodic table ?

Last Answer : Mendeleev introduced the modern periodic table with 67 elements.

In which group of elements of the modern periodic table are halogen placed ?

Description : In which group of elements of the modern periodic table are halogen placed ?

Last Answer : In which group of elements of the modern periodic table are halogen placed? a. 17 b. 6 c. 4 d. 2

Mention the merits of Mendeleev’s periodic law.

Description : Mention the merits of Mendeleev’s periodic law.

Last Answer : Mendeleev left vacant spaces in the table for the elements that were to be discovered. He was able to predict the atomic mass and properties of elements even before their discovery. His periodic table helped to discover new elements like germanium.

State Mendeleev’s periodic law.

Description : State Mendeleev’s periodic law.

Last Answer : Mendeleev’s periodic law states that “The properties of elements are periodic functions of their atomic mass”.

What is Mendeleev’s periodic law?

Description : What is Mendeleev’s periodic law?

Last Answer : What is Mendeleev’s periodic law?

What is Mendeleev's periodic law?

Description : What is Mendeleev's periodic law?

Last Answer : the principle that chemical properties of the elements are periodic functions of their atomic numbersMendeleev's periodic law states that properties of elements are periodic functions of their atomic masses.

What is Mendeleev's periodic law?

Description : What is Mendeleev's periodic law?

Last Answer : the principle that chemical properties of the elements are periodic functions of their atomic numbersMendeleev's periodic law states that properties of elements are periodic functions of their atomic masses.

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.

MENDELEEV’S PERODIC TABLE

Description : MENDELEEV’S PERODIC TABLE

Last Answer :  The physical and chemical properties of element are a periodic function of their atomic masses.  The tabular arrangement of the element based on the periodic law is called Mendeleev's ... different properties. E.g. Manganese is placed with halogens which totally differ in the properties.

Where are the smallest atoms seen at the modern periodic table?

Description : Where are the smallest atoms seen at the modern periodic table?

Last Answer : Right hand top

Modern periodic table was developed by?

Description : Modern periodic table was developed by?

Last Answer : Henry Moseley

Modern periodic table was discovered by?

Description : Modern periodic table was discovered by?

Last Answer : Henry Moseley

Modern periodic table contains?

Description : Modern periodic table contains?

Last Answer : 7 horizontal rows and 18 vertical columns

The modern periodic table is based on?

Description : The modern periodic table is based on?

Last Answer : atomic number

The modern periodic table was adopted by IUPAC in

Description : The modern periodic table was adopted by IUPAC in

Last Answer : 1984.

How does the electronic configuration of an atom relate to its position in the modern periodic table?

Description : How does the electronic configuration of an atom relate to its position in the modern periodic table?

Last Answer : The group number of elements having up to two valence electrons is equal to the number of valence electrons. For example: Group 1 elements have 1 valence electron. Group 2 elements have 2 valence electrons. Group 13 elements have 3 valence electrons.

List the short period, long period and incomplete periods in the modern periodic table

Description : List the short period, long period and incomplete periods in the modern periodic table

Last Answer : Periodnumber 1st 2 nd Description Veryshort 8 elements (Li to Ne) Long 18 elements (K to Kr) Very long 32 elements (Cs to Rn) Short 5 Long 4 th 6 th 7th 2 (H & He) Short ... of elements incomplete 8 elements ( Na to Ar) 18 elements (Rb to Xe) Rest of the elements (Fr onwards)

How many periods and groups are there in the modern periodic table?

Description : How many periods and groups are there in the modern periodic table?

Last Answer : In the modern periodic table there are 7 periods and 18 groups.

What are periods and groups in the modern periodic table?

Description : What are periods and groups in the modern periodic table?

Last Answer : The horizontal rows in the periodic table are called periods. The vertical columns in the periodic table are called groups.

Mention the characteristics of modern periodic table.

Description : Mention the characteristics of modern periodic table.

Last Answer : When elements are arranged according to increasing atomic numbers, elements having similar properties are kept in the same group. There is a inter relation between electronic configuration and ... elements are arranged in 7 horizontal rows called periods and 18 vertical columns called groups

How many rows and columns are in the modern Periodic Table? A. 18 columns and 7 rows (Answer) B. 12 columns and 9 rows C. 7 columns and 18 rows D. 25 columns and 15 rows

Description : How many rows and columns are in the modern Periodic Table? A. 18 columns and 7 rows (Answer) B. 12 columns and 9 rows C. 7 columns and 18 rows D. 25 columns and 15 rows

Last Answer : A. 18 columns and 7 rows (Answer)

MODERN PERIODIC TABLE

Description : MODERN PERIODIC TABLE

Last Answer :  The chemical and physical properties of elements are a periodic function of their atomic numbers.  The periodic table based on modern periodic law is called as Modern Periodic ... table disappears.  Elements are classified according to their electronic configuration. Into different blocks.

Which is the basis of modern periodic table? -Do You Know?

Description : Which is the basis of modern periodic table? -Do You Know?

Last Answer : answer:

What is the main basis of modern periodic table ?

Description : What is the main basis of modern periodic table ?

Last Answer : The true basis of the modern periodic table is the electron configuration.

Who is the father of modern periodic table ?

Description : Who is the father of modern periodic table ?

Last Answer : Mendeleev, the father of the modern periodic table.

Hydrogen occupies a unique position in Modern Periodic Table". Justify the statement.

Description : Hydrogen occupies a unique position in Modern Periodic Table". Justify the statement.

Last Answer : Hydrogen occupies a unique position in Modern Periodic Table". Justify the statement.

How many horizontal rows and vertical columns are present in the modern periodic table?

Description : How many horizontal rows and vertical columns are present in the modern periodic table?

Last Answer : How many horizontal rows and vertical columns are present in the modern periodic table?

In modern periodic table, the period number indicates the :

Description : In modern periodic table, the period number indicates the :

Last Answer : In modern periodic table, the period number indicates the : a. atomic number b. atomic ... . principal quantum number d. azimuthal quantum number

Who invented the modern Periodic table? (1) Faraday (2) Mendeleev (3) Newton (4) Bohr

Description : Who invented the modern Periodic table? (1) Faraday (2) Mendeleev (3) Newton (4) Bohr

Last Answer : (2) Mendeleev Explanation: Dmitri Mendeleev was a Russian chemist who developed the periodic classification of the elements in 1869 A.D.

Which is the basis of modern periodic table?

Description : Which is the basis of modern periodic table?

Last Answer : Atomic number

Explain the Modern Periodic Law , also define salient features of modern periodic table

Description : Explain the Modern Periodic Law , also define salient features of modern periodic table

Last Answer : Ans : Modern Periodic Law : Based on the concept of atomic number Bohr , Werner & Bury proposed the modern periodic law as ; The physical & chemical properties of all elements are ... periods. The physical & chemical properties of elements change from metallic to non metallic along a period.

What is the periodic table of elements?

Description : What is the periodic table of elements?

Last Answer : Answer: The periodic table of elements is a chart that arranges all known chemical elements in order of increasing atomic number, based on their electron configurations and chemical properties. ... as it allows scientists to predict the properties and behavior of different elements and compounds.

Do chemists have to memorize all the elements of the periodic table?

Description : Do chemists have to memorize all the elements of the periodic table?

Last Answer : answer:I don't see why they would have to , since most chemists don't work with all elements. On the other hand, just like readers memorized the alphabet and how to spell and ... have similar properties to each other, as well as isotopes of each. Familiarity sometimes breeds more familiarity.

(a) What are ‘groups’ and ‘periods’ in the ‘periodic table’? (b) Two elements M and N belong to group I and II respectively and are in the same period of the periodic table. How do the following properties of M and N vary? Sizes of their atoms Their metallic characters Their valencies in forming oxides Molecular formulae of their chlorides -Science

Description : (a) What are groups' and periods' in the periodic table'? (b) Two elements M and N belong to group I and II respectively and are in the same period of the periodic ... Sizes of their atoms Their metallic characters Their valencies in forming oxides Molecular formulae of their chlorides -Science

Last Answer : (a) The vertical columns in the periodic table are called groups'. The horizontal rows in the periodic table are called periods'. (b) M' and N' belong to same period but group I ... oxides. Valency goes on increasing first and then decreases. MCI, NCI2 are molecular formulae of their chlorides.

a) What is meant by periodicity in properties of elements with reference to the periodic table? (b) Why do all the elements of the same group have similar properties? (c) How will the tendency to gain electrons change as we go from left to right across a period? Why? -Science

Description : a) What is meant by periodicity in properties of elements with reference to the periodic table? (b) Why do all the elements of the same group have similar properties? (c) How will the tendency to gain electrons change as we go from left to right across a period? Why? -Science

Last Answer : (a) The repetition of same properties after definite interval is called periodicity in properties. (b) It is because they have same valence electrons therefore, have similar properties. (c) ... to right in a period because atomic size goes on decreasing and effective nuclear charge increases.

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.

1The elements of the second period of the Periodic Table are given below: Li Be B C N O F (a) Give reason to explain why atomic radii decrease from Li to F. (b) Identify the most (i) metallic and (ii)non-metallic element. -Science

Description : 1The elements of the second period of the Periodic Table are given below: Li Be B C N O F (a) Give reason to explain why atomic radii decrease from Li to F. (b) Identify the most (i) metallic and (ii)non-metallic element. -Science

Last Answer : a) It is because nuclear charge increases due to increase in atomic number, therefore, force of attraction between nucleus and valence electrons increases, i.e. effective nuclear charge increases, hence ... element is ‘F’ because it can gain electrons easily due to smallest atomic size.

The names of the scientists, Newlands, Mendeleev and Meyer are associated with the development of (a) Atomic structure (b) Metallurgy (c) Periodic table of elements (d) Discovery of elements

Description : The names of the scientists, Newlands, Mendeleev and Meyer are associated with the development of (a) Atomic structure (b) Metallurgy (c) Periodic table of elements (d) Discovery of elements

Last Answer : Ans:(c)