Question

Find out the number of proton electron and neutron in the nuclie 40^A18​

Answer 1

In this symbol of nuclei,

Atomic number ( number of protons ) = 18

And we know that... in a neutral atom

number of electrons = number of protons = 18

In the symbol,

Mass number (number of protons + neutrons)= 40

=> number of neutrons = 40 - number of protons

number of neutrons = 40 - 18 = 22

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