Answer:B
Explanation:Coefficient represents the number of units of each substance.
Non-metals. it is fluorine i believe and in the periodic table it is under the non-metal category
By 'waves' do you mean sound waves? If so sound waves need to travel through things like solids, liquids and yup <u>gases. </u>When the waves travel they are vibrating the molecules in the matter. By doing this he molecules in solids are packed very tightly.
