Question

In the following table, the mass number and the atomic number of certain elements are given:

Elements Mass No. Atomic No.

A 2 1

B 3 1

C 3 2

D 6 3

E 9 4

F 11 5

G 19 9

H 23 11

(a) How many neutrons are present in ‘F’?

(b) Which atoms are isotopes of the same element?

(c) Which atom will form singly positively charged ion?

(d) Which is the atom of an inert gas?

(e) Which will form singly negatively charged ion ?

(f) Which of these has 11 electrons?

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Answer 1

Answer:

(a) six neutron (6)

(b) A and B are the isotopes of same element i.e hydrogen

(c) D and H

(d) C

(e) G

(f) H

Answer 2

Answer:

a = 6

b= A and B

c=D and H

d=C

e=G

f=H

Hope it will help you