Question

what is the number of neutrons in 37Cl17

Answer 1

Atomicmass = Proton + neutron
Atomic mass- proton = Neutrons
37-17= 20
=20 neutrons

Answer 2

In 37Cl17, 37 is the mass number(atomic mass) & 17 is the atomic number.

Chlorine atoms contain 17 protons so the atomic number of Chlorine atom is 17.

Atomic number = number of protons

Mass number(atomic mass) = number of protons + number of neutrons

37 = 17+ number of neutrons

Number of neutrons= 37-17= 20

Hence , number of neutrons in 37Cl17 = 20

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