Question

1. Mass number of an atom is the number of protons and
2. The sub-atomic particle with a negligible mass.
3. An atom having stable electronic configuration.
4. A molecule formed by sharing of electrons (covalency].
5. A metallic atom having unstable electronic configuration.

help box :-
a)Electron
b)Argon
c)Nitrogen
d)Sodium
e)Neutrons​

Answer 1

Answer:

1) neutrons

2) electrons

3)argon

4)nitrogen

5) sodium.

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Answer 2

Answer:

1) neutrons

2)nitrogen

3) argon

4)sodium

5)electron