Select the correct answer from each drop-down menu. Hydrogen can be created by [ Select ] water. If the activation energy is reduced, hydrogen can be produced with a renewable energy source. This renewable energy source is [ Select ] energy.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

hurricanes form in warm water