Question

The description of atomic particles of two elements of X and Y is given

below :

PROTONS NEUTRONS ELECTRONS

X 8 8 8

Y 8 9 8

a. What is the atomic number of Y?

b. What is the mass number of X?

c. What is the relation between X and Y?

d. Which element or elements do they represent?

e. State the electronic configuration of X?

f. State the cation or anion formed by the element.​

Answer 1

Answer:

Explanation:

1) Atomic number = Neutrons + Protons

Atomic number of X is 8+8=16

2) Mass Number = Neutrons +Protons +

Electrons

Mass no. of Y is 8+8+9=25

3) They both lie in same period in periodic table. Both are non-metal.

4)Electronic configuration of X is 2,8,6.

5) It is a non-metal therefore it's valency is valency = 8-valence electrons.

Therefore it's valency is 8-6=2