Question

8. Explain with examples (i) Atomic number, (ii) Mass number,
(iii) Isotopes and iv) Isobars. Give any two uses of isotopes.
9. Na has completely filled K and L shells. Explain​

Answer 1

Answer:

1. Atomic number

Explanation:

l hope right friend

Answer 2

Answer:

I don't know physical science and chemical equations and hydrogen nitrogen idont know but I know idont tell you bro or sis