Question

Gold-198 has an atomic number of 79. it has __________ neutrons

Answer 1

119 is the answer, if you'd subtract 198 to 79 you will get your result. hope this helped u ppl

Answer 2

Neutrons are the subatomic particles present in an atom having no charge i.e. neutral and mass of the neutron is approximately same as the mass of the proton.

Number of neutrons is equal to the subtraction of atomic mass and atomic number.

Number of neutrons = Atomic mass - atomic number

Atomic number of gold is 79 and atomic mass of gold is 198 amu.

Substitute the above value in formula, we get

Number of neutrons =
`198-79`

=
`119`

Thus, number of neutrons =
`119`