Question

In the following table the mass no. and the atomic no. of certain elements are given: -

ELEMENTS A B C D E F

MASS NO. 2 3 4 14 31 19

ATOMIC NO. 1 1 2 11 15 13

Now answer the following: -

i) Name two atoms which are isotopes.

ii) Name the noble gas ​​

Answer 1

Explanation:

i) hydrogen

ii) hydrogen