Atom is made up of 3 subatomic particles:
• protons: mass = 1.67262 × 10−27 kg
• neutrons: mass = 1.67493 × 10−27 kg
• electrons: mass = 9.10938 × 10−31 kg
In the center of the atom is the nucleus.
what region of an atom contains the protons and neutrons
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