These groups are 17 and 18.
Its group 16
Bromine, group 17; Mercury, group 12. Both are liquids at STP
Pumice is nonmetallic.
Oxygen
The only nonmetallic element that is liquid at room temperature is bromine.
Group 18
Its group 16
Bromine, group 17; Mercury, group 12. Both are liquids at STP
Group 17, the halogens
bismuth
oxygen
no, coal is not metallic because it is almost completely composed of carbon, a nonmetallic element that is 6th in the periodic table.
nonmetallic
oil is nonmetallic
Pumice is nonmetallic.
Nonmetallic
Oxygen