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What is the nucleus made up of?
Protons and neutrons.
What is the shells outside around the nucleus?
Electrons.
What do all atoms of an element have the same number of?
Protons.
Why do atoms of an element have the same number of protons?
They determine the element.
Out of protons, neutrons and electrons, which two have the same numbers in an atom?
Protons and electrons.
Why do atoms have an overall neutral charge?
The positive charge of the protons balances the negative charge of the electrons.
What is an isotope?
Atoms of the same element (the same number of protons) with a different number of neutrons.
What is the relative mass of a proton?
1
What is the relative charge of a proton?
+1
What is the relative mass of a neutron?
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