Ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions.
The main difference between the 3 isotopes of hydrogen are the number of neutrons in the nucleus. Hydrogen has no neutrons, Deuterium has one neutron, and tritium has two neutrons. All three have one proton and one electron.
You could write about a fear you may have had as a child, eg. the dark, or underneath the bed, etc...
Answer:
A
Explanation:
Matter is anything that has weight and occupies space. Weight is synonymous to mass
