i. There are 7 periods in the long form of the periodic table. ii. Elements are classified on the basis of their atomic numbers.

Question

State whether the following statements are True or False. Rewrite the correct statement:

i. There are 7 periods in the long form of the periodic table.

ii. Elements are classified on the basis of their atomic numbers.

iii. The chemical properties of the elements in the same group show similarity.

iv. Lanthanides and actinides are also called the d-block elements.

v. All the elements of a group have the same number of valence electrons.

vi. In a period, atomic sizes increases from left to right.

vii. In a period, the metallic character increases from left to right.

viii. In a group, the metallic character decreases from top to bottom.

ix. The zig-zag line separates the metals from nonmetals in the periodic table i.e. metals are on the left side and nonmetals are on the right side.

Answer 1

i. True.

ii. False. (Elements are classified on the basis of their electronic configuration.)

iii. True.

iv. False. (Lanthanides and actinides are also called the f-block elements.)

v. True.

vi. False. (In a period, atomic size decreases from left to right.)

vii. False. (In a period. the metallic character decreases from left to right.)

viii. False. (In a group, the metallic character increases from top to bottom.)

ix. True.