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Definitions
Important
Question | Answer |
---|---|
Atomic Number | # p+ in nucleus |
Mass Number | # p+ & # n0 = Atomic Number + # n0 |
Isotopes | atoms of same element with different numbers of n0 in nuclei |
Molecule | aggregate of 2(+) atoms in definite arrangement held together by chemical forces |
Diatomic Molecule | contains only 2 atoms |
Polyatomic Molecule | contains >2 atoms |
Law of Multiple Proportions | Ex: CO = O/C = 1 Ex: CO2 = O/C = 2 |
Ion | atom or group of atoms that have a net +/- charge |
Cation | Ion with + charge; if neutral atom loses 1(+) electrons, becomes cation [only metals] |
Anion | Ion with - charge; if neutral atom gains 1(+) electrons, becomes anion [only nonmetals] |
Monatomic Ion | contains only 1 atom |
Polyatomic Ion | contains >1 atom |
Ionic Compounds | combination of cations and anions; compound consisting a metal & nonmetal |
Organic Chemistry | Branch of Chemistry, deals with Carbon compounds |