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Chap 17-18 PS
Chap 18 and 17 physical science bob jones
Term | Definition |
---|---|
Element | Any pure substance that is made of only one kind of atom |
Monoatomic elements | Has one atom in its natural state |
Diatomic elements | Has two atoms in its natural state |
Periodicity | The repetition of certain properties at regular intervals when elements were placed in order of atomic mass |
Period | A group on the periodic table |
Series | A family on the periodic table |
Metals | The belong to family's with relatively few valence electrons. Luster, malleable, conduct electricity, ductile |
Non metal | Hold their electrons tightly. Lack luster, brittle, does not conduct electricity, not ductile |
Electron affinity | Deals with the strength of attraction of electrons to unbounded atoms. |
Electronegativity | Deals with an atom's ability at attract and hold electrons when bonded to other atoms. |
Covalent bonds | Nonmetal and nonmetal. Shard electrons |
Ionic bonds | Metal and non metal. Gives and takes electrons |
Metallic bonds | Metal and metal. All electrons shared. |
Electron sea theory | Atoms with weak elecronegativities usually have only a few loosely held valence electrons. |