a. 7 protons, 7 electrons, 10 neutrons
b. 19 protons, 19 electrons, 26 neutrons
c. 53 protons, 53 electrons, 84 neutrons
<h3>Further explanation</h3>
Given
Atom and mass number
Required
The number of each subatomic particle
Solution
a. Nitrogen atom(atomic number = 7)
mass number = 17 amu
atomic number=number of protons=number of electrons(in neutral atom)
so number of protons=number of electrons = 7
mass number = protons+neutron
17 = 7 + neutrons
number of neutrons = 17-7=10
b. Potassium atom (atomic number = 19)
mass number = 45 amu
atomic number=number of protons=number of electrons(in neutral atom)
so number of protons=number of electrons = 19
mass number = protons+neutron
45 = 19 + neutrons
number of neutrons = 45-19=26
c. Iodine atom ((atomic number = 53)
mass number = 137 amu
atomic number=number of protons=number of electrons(in neutral atom)
so number of protons=number of electrons = 53
mass number = protons+neutron
137 = 53 + neutrons
number of neutrons = 137-53=84
