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Phy Sci 17/18
17/18 definitions
Term | Definition |
---|---|
Elements represented by | chemical symbols |
single elements | monatomic |
diatomic elements | hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine |
elements arranged in specific order with all their details (Mendeleeev) | periodic table of elements |
The properties of the elements vary with their atomic numbers in a periodic way. | periodic law of elements |
Solid, ductile, malleable, highly conductive, and chemically active | metal |
Gas, liquid, dull, brittle, room temp, poor conductors | nonmetal |
tells how many valence electrons | groups |
group 1 | alkali |
group 2 | alkaline earth metals |
group 1b to 8b | transition |
group 3 | boron |
group 4 | carbon |
group 5 | nitrogen |
group 6 | oxygen |
group 7 | halogen |
group 8 | noble gases |
Horizontal rows | periods |
Symbol with dots around it | electron dot structure |
Have full 8 electrons | octet rule |
How well an atom holds or attracts electrons | electron affinity |
how well an atom can attract or hold an electron when bonded to other atoms. | electronegativity |
when atoms share electrons(nonmetal-nonmetal) | covalent bond |
Atom which gains electrons and becomes an anion (metal-nonmetal) | ionic bond |
metal-metal | metallic bond |
three or more atoms | polyatomic molecules |