If you use 24He notation then the bottom number in the number of protons and electrons and the top number minus the bottom number is the number of neutrons
up and down quarks, electrons
electrons
Atoms are made up of protons, neutrons and electrons. However, each of these subatomic particles is made up of smaller subatomic particles such as quarks.
Protons and neutrons.
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Two particles are considered. they are protons and nrutrons
Protons plus the neutrons
The mass number is the sum of protons and neutrons in the atomic nucleus.
Subatomic particles with no charges are neutrons
All subatomic particles have mass.
Subatomic particles are: neutron, proton, electron.
Everything is made of subatomic particles.