Which elements are most likely to be gases at room temperatrue?

Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and are found as diatomic molecules (H2, N2, O2, F2, Cl2).

Explanation: Hope this helps :)

h

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements