What is the total number of elements in group 17 that are gases at room temperature and standard pressure?

There are 2 elements in group 17 (fluorine and chlorine) that are gases at room temperature and standard pressure.

Explanation:

Group 17 elements are known as halogens. The general electronic configuration for the elements in this group is , where n = highest principle quantum number.

The elements belonging to this group are:

Hence, there are 2 elements in group 17 (fluorine and chlorine) that are gases at room temperature and standard pressure.

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.