Question

The heaviest fundamental particle is
a. proton
b. electron
c. neutron
d. hydrogen

Answer 1

hey your answer is neutron
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Answer 2

The heaviest fundamental participle is the Neutron.

Neutrons comprise of gluons and  consist of two down quarks and one up quark.

These quarks vary in their mases.

Thus Neutron has more mass than proton and electron. It weighs 1.675×10(-27) kg.

It is heavier by 0.1% of measurement.

Neutrons are also said to be heavier than electron 1836 times