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Atomic Number
Number of protons in an atom.
Mass Number
Total number of protons + neutrons.
Ions
Atom that gains or loses electrons and becomes charged.
Cation
Positive ion formed by losing electrons.
More protons then electrons.
Anion
Negative ion formed by gaining electrons.
More Electones then Protons
Isotope
Atoms of the same element with different numbers of neutron
Isotope 2
Same number of protons, different mass number.
Valence Electrons
Electrons in the outermost shell involved in bonding
Ionic Bond
Cation & Anion
Covalent Bond
Bond formed by sharing electrons.
Hydrogen Bond
Weak attraction between polar molecules.