Give an example of how matter flows through a system.

What are the two largest greenhouse gases

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron

What changes occur in the reaction indicated by the equation? check all that apply. the hydrogen nucleus loses protons. the oxygen nucleus gains protons. the bond in h2 is broken, and new bonds are formed between hydrogen and oxygen atoms. each electron associated with a hydrogen atom is shared with an oxygen atom.