Study the extract of the Periodic Table given below and answer the questions. Give the alphabet corresponding to the element in question. Do not repeat an element. State which element :

(i) Forms an electrovalent compound with G.

(ii) Is non-metallic and has a valency of 2?

(iii) Is an inert gas?

(iv) State the ion of which element will migrate towards the cathode during electrolysis.

Choose the correct answer from the given options given :

The element with highest ionization potential is :

1. Hydrogen
2. Caesium
3. Radon
4. Helium

The question represents the elements P, Q. R and their atomic numbers.

Answer the following using only the alphabets given — P = 13; Q = 7; R = 10

(i) Which element combines with hydrogen to form a basic gas.

(ii) Which element has an electron affinity zero.

(iii) Name the element, which forms an ionic compound with chlorine.

Name the element : An alkaline earth metal present in group 2 and period 3.