Question

(a) What are the periods and groups in a periodic table? Give two characteristics of each.
(b) In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group.
(c) Given alongside is a part of the periodic table. As we move vertically downward from Li to Fr Li
Be
Na
K
Rb
Cs
Fr
Ra
(i) What happens to the size of atoms?
(ii) What happens to their metallic character?
(d) Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?
(e) Rewrite the following statement after correction, if necessary
Groups have elements with consecutive atomic numbers.

Answer 1

Answer:

( c)

1. increase
2. increase

Explanation:

(a)in periodic table

18 group & 7 period

(b) cu²⁹,Cŕ²⁴