Question

Which of the following is not present in a hydrogen atom?
a.proton
b. neutron
C nucleus
d electron
8. What is the maximum number of electrons that can be accommodated by the M shell?
a 2
b.8
c.18
d. 32​

Answer 1

Answer:

ans of 1st quaction = nucleus

and ans of second quaction is = c 18 electron

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Answer 2

Explanation:

neutron does not present in a hydrogen atom. this is the only element consisting no neutron.

2n^2

2*3^2

2*9

18

as m is the third shell