Respuesta :
When a chemist mixes oxygen gas and hydrogen gas to form
water, which is composed of one oxygen and two hydrogen atoms per molecule. The hydrogen and oxygen atoms bounds together by making a bond called covalent bond. In a covalent bond, two atoms are bound
together because they each want to "share" each other's electrons.
Answer:
A chemical change.
Explanation:
I just took the test and got it right.
