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One atom of ""19^(39)K""contains...

One atom of `""_19^(39)K""`contains

A

`19p,20nand 19e^(-)`

B

`19p,20nand 20e^(-)`

C

`20p,19nand 20e^(-)`

D

`20p,19nand 19e^(-)`

Text Solution

Verified by Experts

The correct Answer is:
a
`""_(19)^(39) K`contains: protons,p=19
Neutrons,n=20
Electrons,e=19
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