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Element - ✔️✔️Simplest type of matter; composed of only one kind of atom
Atom - ✔️✔️Smallest particle of an element. Consists of protons, neutrons, and
electrons
Protons - ✔️✔️Positively charged; located in the nucleus
Electrons - ✔️✔️Negatively charged; located around the nucleus
Neutrons - ✔️✔️No charge; located in the nucleus
Matter - ✔️✔️Anything that occupies space and has mass
Mass - ✔️✔️Amount of matter in an object
Weight - ✔️✔️Force exerted by earth's gravity on matter
Atomic number - ✔️✔️Unique number of protons in atom
Mass number - ✔️✔️Sum of protons and neutrons
Isotopes - ✔️✔️Atoms that have the same atomic number, but different mass numbers
Atomic mass - ✔️✔️Average mass
Mole - ✔️✔️6.002 x 10²³
Ions - ✔️✔️Atoms that have gained or lost electrons
Cation - ✔️✔️Atom that lost electrons; positively charged
Anion - ✔️✔️Atom that gained electrons; negatively charged
Covalent bond - ✔️✔️Electron pairs are shared between atoms
Polar covalent bond - ✔️✔️Sharing of electrons is unequal