what is the mass number of an aton with 3 protons,4 neutrons,and 3 electrons
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Answer:
mass = 7 it is nitrogen. It is non metal
Explanation:
mass = neutron+proton
so,3+4=7
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Mass number is = protons + neutrons
= 3+4 = 7
Atom is lithium as the atomic number (proton number) is 3
= 3+4 = 7
Atom is lithium as the atomic number (proton number) is 3
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