Question

Which of the following atomic particle have a least mass?
A) Proton
B) Electron
C) Deutron
D) Neutron

Answer 1

Answer:

Explanation:

A

Answer 2

Electron is the atomic particle that has the least mass.(option - b)

• H² /D - Deuteron consists of 1 proton,1neutron, and has atomic mass = 2g (number of protons + number of neutrons).
• D is an isotope of Hydrogen.
• ALL others - neutron, protons, and electrons are subatomic particles.
• Proton atomic mass is 1 atomic mass unit = 1.6 × 10⁻²⁷kg.
• It has a = +1 charge.
• Mass of neutron is equal to the mass of proton =1.6 × 10⁻²⁷kg.
• An electron has a negative charge and its mass is 9.1 × 10⁻³¹kg i.e. 2 times less than that of proton and neutron.