Question

How many protons, neutrons and electrons are in these atoms?

Answer 1

Answer:

A. Proton = 6

Neutron = 7

Electron = 6

B. Proton = 56

Neutron = 74

Electron = 56

C. Proton = 92

Neutron = 140

Electron = 92

Explanation:

A. Mass number = 13

Atomic number = 6

Proton = Atomic number = 6

Since the element has no charge,

Electron = proton = 6

Mass number = proton + Neutron

Neutron = Mass number — proton

Neutron = 13 — 6 = 7

B. Mass number = 130

Atomic number = 56

Proton = Atomic number = 56

Since the element has no charge,

Electron = proton = 56

Mass number = proton + Neutron

Neutron = Mass number — proton

Neutron = 130 — 56 = 74

C. Mass number = 232

Atomic number = 92

Proton = Atomic number = 92

Since the element has no charge,

Electron = proton = 92

Mass number = proton + Neutron

Neutron = Mass number — proton

Neutron = 232 — 92= 140