Question

19. Name the following:
(a) The element which does not contain any neutron in its
nucleus.
(b) An element having valency 'zero'.
(c) Metal with valency 2.
(d) Two atoms having the same number of protons and
electrons but different number of neutrons,
(e) The shell closest to the nucleus of an atom.​

Answer 1

Explanation:

option e is absolutely correct dear good morning friends have a great day

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Answer 2

A) Hydrogen
B)Neon
C)Magnesium
D)chlorine and Argon
E)K she’ll