Question

(2) Observe the following table and answer the given questions :
A=1
B=8
C=10
D=11
E=12
F=17

(i) Which of the given elements is a stable element?

(ii) Identify any one metal and one non-metal from the above elements.

(iii) ID combines with P then which compound is formed?

(iv) Write the electronic configuration of element B and element E.​

Answer 1

Answer:

E has the atomic number 19 with the electronic configuration 2,8,8,1. It has 1 valence electron so it is easy to donate this electron. Hence, E is a metal. F has the atomic number 8 with the electronic configuration 2,6. It has 6 valence electrons and hence it is easy to gain 2 electrons to become stable. So F is a non metal. G has the atomic number 17 with the electronic configuration 2,8,1. It has 7 valence electrons and hence it is easy to gain an electron to become stable. So G is a non metal.

Answer 2

Answer:

c is the stable element

b and f is non metal and d and e are metals

b = 2,6

E= 2,8,2