Helium, Hydrogen, Nitrogen, Carbon.
Hydrogen
No, selenium is a nonmetal.
Bromide is the ion of the element bromine, which is a nonmetal.
A nonmetal is an element that tends to be dull, brittle, and a poor conductor of heat and electricity.
Bromine is the only nonmetal element that is a liquid at room temperature.
Boron. Symbol: B. its a nonmetal too.
Fluoride is the ion of fluorine, which is a nonmetal.
it is nonmetal
nonmetal
Yes
Bromine
No, oxygen, as a nonmetal element, cannot have an expanded octet in its valence shell.