Question

which of these gases are elements and compounds.
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Answer 1

Answer:

Of these, all the noble gases (group 18) are monatomic gases, whereas the other gaseous elements are diatomic molecules (H 2, N 2, O 2, F 2, and Cl 2).

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Some Common Substances That Are Gases at 25°C and 1.0 atm.

Elements Compounds

Ar (argon) HBr (hydrogen bromide) C 3H 8 (propane)

Explanation:

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Answer 2

Answer:

which?.....

Explanation:

H, He, N, O, F, Ne, Cl, Ar, Kr, Xe, and Rn

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