Nonmetals- noble Gases

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Presentation transcript:

Nonmetals- noble Gases

Group 18- Noble Gas family Helium- He Argon-Ar Xenon-Xe Neon-Ne Krypton-Kr Radon-Rn

Physical properties- Noble Gases Colorless, odorless Low melting and boiling points Some of the noble gases are lower in density compared to the air, because of their mass Chemical properties- Noble Gases Low chemical reactivity (valence shell full) Chemically stable (does not want to react) Normally do not form compounds (do not bond with other elements) Do not gain, lose, or share e- (valence shell full) Typically Nonflammable

States of matter- Noble Gases Gas state in the natural world (earth and space) Due to low boiling point and low freezing point Atomic Structure- Noble Gases Valence electron shell: e- on the outer shell of the atom 8 valence e-, except He (only 2) Ex. He: p+:2 n:2 e-:2

Real World Uses Cryogenic storage Used as light (Neon lights= low chemical rxns.) Formed into lasers Ventilators (heliox- 80% helium)