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chem chp 2
Term | Definition |
---|---|
Electron | -1 |
Proton | +1 |
Neutron | 0 |
Atomic number | number of Protons in nucleus |
Mass number | Protons + neutrons |
Isotopes | Atoms of same element w/ diff numbers of neutrons in their nucli |
Ion | Atom or group of atoms with net positive or neg. charge. |
cation | ion w/ + charge |
anion | ion w/ - charge |
neutral atom gains 1/more electron | anion |
neutral atom loses 1/more electron | cation |
Ionic compound | composed of cation & anion (metal + nonmetal) |
Acid | Yields H+ (Hydrogen) ions when dissolved in water |
Base | Yields OH- (Hydroxide) ions when dissolved in water |