What happens when an electron moves from a high energy level to a lower one?
a. it absorbs light
b. it emits light
c. it disappears
d. it gets bigger

Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3no2(g)+h2o(l)→2hno3(l)+no(g) part a suppose that 4.2 mol no2 and 0.50 mol h2o combine and react completely. which reactant is in excess? express your answer as a chemical formula. nothing

You may expect bonds between two atoms which each have n covalent lonic metallic hydrogen

Iwill give extra points to who gets this right