Question

Which particle of an atom has the least mass? a) alpha particle b) beta particle c) neutron d) proton

Answer 1

Answer:

beta particle

Explanation:

Beta particles are just electrons which virtually no mass

Answer 2

Answer:

The particle of an atom that has the least mass is beta particle

Explanation:

• The majority of an atoms' mass comes from the protons and neutrons that make up its nucleus. Electrons are the least massive of an atom's constituent particles, with a mass of 9.11 x 10-31 kg and a size too small to be measured by current techniques
• Beta particles (β) are high energy, high speed electrons (β-) or positrons (β+) that are ejected from the nucleus by some radionuclides during a form of radioactive decay called beta-decay. Beta-decay normally occurs in nuclei that have too many neutrons to achieve stability.
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