Question

calculate the number of electron,proton and neutron in 40k+

Answer 1

40 k hi honge dono particles

Answer 2

Given Ion is K+

Atomic number of  K+ ion is 19

So number of Protons= 19

As one electron is removed , so number of electrons=18

Mass number= Number of protons +number of neutrons

40=19+number of neutrons

number of neutrons=40-19=21

So 40K+ has 18 electrons, 19 protons and 21 neutrons

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