Question

the mass number of an atom is 40 and its atomic number is 18 find the n
umber of neutron number of proton ,electron in the atom​

Answer 1

Answer: neutons-22

              protons 18

              electrons-18

step-by-step explanation;

number of proton is 18 because the atomic number is the same withe the number of protons, the number of neutons is 22 because the sum of protons and neutrons make up mass number and the number of electrons is 18 because electrons and protons are equal in an atom.

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Answer 2

Answer:

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