Mention the advantages of the periodic table.

1 Answer

Answer :

a) Study of chemistry is simplified and organized leading to easy access of data of the

elements.

b) It was possible to predict the atomic mass, some properties and other details of

elements which are yet to be discovered during the time of Mendeleev.

c) There is striking similarity between the periodic table constructed empirically by

Mendeleev and the modern periodic table based on electronic configuration and

nature of chemical bond.

d) Interpretation of trends and periodicities of properties of elements provide a clear

understanding and proof for atomic behavior.

e) It is possible to predict the properties of elements by considering the position of

elements in the periodic table. On the other hand properties of element helps us to

predict the position of an element in the periodic table.

Related questions

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

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.

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.

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.

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.

Description : why is the periodic table symbol for sodium, Na ?

Last Answer : Many of them, like lead (Pb) are named after their latin roots.

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.

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.

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.

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.

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.

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)

Description : Which period have the largest number of elements in the periodic table?

Last Answer : The sixth period

Description : Where are the Largest atoms seen at the periodic table?

Last Answer : Bottom left

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

Last Answer : Right hand top

Description : How many groups are there in the mod- ern periodic table?

Last Answer : Eighteen

Description : The vertical columns of the periodic table are called

Last Answer : Groups

Description : Modern periodic table was developed by?

Last Answer : Henry Moseley

Description : The horizontal rows of elements in the periodic table are called?

Last Answer : Periods

Description : 1st noble gas group in the periodic table?

Last Answer : Helium

Description : First element in the periodic table?

Last Answer : Hydrogen

Description : Total number of elements in periodic table?

Last Answer : 118

Description : The longest period of the periodic table?

Last Answer : Sixth period

Description : The shortest period of the periodic table?

Last Answer : First period

Description : The periodic table is divided into 4 main blocks: they are?

Last Answer : block - elements of group 1 and 2; P block - ele- ments of group 13to 18; D block - elements of group 3 to 12; F block - Lanthanides and Actinides

Description : The right side of the periodic table de- notes?

Last Answer : Non-metals

Description : The left side of the periodic table de- notes?

Last Answer : Metals

Description : Columns are periodic table called?

Last Answer : Groups

Description : The rows in periodic table are called?

Last Answer : Periods

Description : Modern periodic table was discovered by?

Last Answer : Henry Moseley

Description : The periodic table was discovered by?

Last Answer : Dmitri Ivanovich Mendeleev

Description : Modern periodic table contains?

Last Answer : 7 horizontal rows and 18 vertical columns

Description : The modern periodic table is based on?

Last Answer : atomic number

Description : Moseley's periodic table was based on the?

Last Answer : atomic number of elements

Description : Mendeleev's periodic table was based on?

Last Answer : increasing order of atomic mass

Description : On going down in a group in the periodic table, the metallic nature of element

Last Answer : increases.

Description : The incomplete period in the periodic table is

Last Answer : seventh period.

Description : The longest period in the periodic table is

Last Answer : sixth period

Description : The shortest period in the periodic table is

Last Answer : first period.

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

Last Answer : atomic number.

Description : The element which is the most reactive of all elements in the periodic table is

Last Answer : fluorine.

Description : The vertical columns of periodic table are called

Last Answer : groups.

Description : The horizontal rows of periodic table are called

Last Answer : periods.

Description : The modern periodic table was adopted by IUPAC in

Last Answer : 1984.

Description : Mendeleev arranged the elements in his periodic table on the basis of

Last Answer : atomic mass.

Description : Give reason: In the construction of periodic table, the periodic law is broken in some places.

Last Answer : Hydrogen resembles both the alkali metals and halogens. But it has been placed with the alkalis. The lanthanides and actinides have not been placed in the main body of the table.

Description : The position of three elements A, B and C in the periodic table shown below: a) State whether A is a metal or non-metal. b) State whether C is more reactive or less reactive than A. c) Will C be larger or smaller in size than B?

Last Answer : a) Metals lie on the left side where as non-metals are B C placed on the right side of the periodic table. Group 17 is on the right side of the periodic table, thus element A is non-metal ... size decreases moving from left to right along a period. So atom C will be smaller in size than B.

Description : The following shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e.

Last Answer : a) Select the letter which represents a metal. b) Select the letter which represents a noble gas. a) d b) c

Description : Taking first period and 17 th group of the periodic table, write gradation of properties with respect to the following: a) atomic size b) Ionisation energy c) electro positivity and electro negativity.

Last Answer : The elements of 1 st period are hydrogen and helium. a) Atomic size of hydrogen is larger then that of helium because atomic size decreases across a period. b) Ionisation energy of helium ... higher as it increases down the group. Electro negativity of fluorine as it decreases down the group.

Description : List the elements of 15 th group of the periodic table. Name the distinct metals and non-metals of the group.

Last Answer : Nitrogen and phosphorous are non-metals. Arsenic and Antimony are metalloids, Bismuth is a metal.