Atomic size of elements increases from top to bottom in a group as more electrons are added to the same . (atom / shell)

The position of elements A, B, and C in the Periodic Table are shown below.

State whether A is a metal or non-metal.

The position of elements A, B, and C in the Periodic Table are shown below.

Will C be larger or smaller in size than B.

Select the correct set of statements regarding change in properties, as we move from left ot right in the second period of periodic table.

(i) Atomic size decreases

(ii) Valency remains the same

(iii) Electronegativity increases

(iV) Metallic character decreases

Study the variation in the atomic radii of second group elements are given below and answer the question given.

In this second period of elements which element has the smallest atomic size?

The atomic numbers of five elements A, B, C, D and E are $6,8, 3, 7$ and $9$ respectively. 

(i) Which is the element having the highest electropositivity among these elements? Why? 

(ii) Which is the element having the least metallic character among these elements? Why? 

(iii) What is your conclusion about the relationship between metallic character and electropositivity of an element? 

Which of the following is not a correct statement about the trends when going from left to right across the periods of the Periodic Table? 

${\mathrm{CaH}}_2, \mathrm{NaH}, {\mathrm{SiH}}_4, {\mathrm{AlH}}_3$

Give valencies of $\mathrm{Ca}, \mathrm{Ni}, \mathrm{Si}, \mathrm{Al}$ in the above compounds.

Study the variation in the atomic radii of second group elements are given below and answer the question given.

In the second period which element has the highest metallic characteristics?