The answer is B. 19 <span>✔
Its 19 because h</span><span> (atomic mass is4.02643(11) u) contains one proton and three </span>neutrons<span> in its nucleus. It is a highly unstable </span>isotope<span> of hydrogen. It has been synthesised in the laboratory by bombarding tritium with fast-moving deuterium nuclei.</span>
Reactants are on the left side of the arrow, while products are on the right
Answer: Dang I wish I wasn't on a school chrome, that way I can see the photo without it getting blocked *cries*
Explanation:
NH3 because the molecule in the room is more solid than and room temperature
Phương trình hóa học: 2Mg+O2->2Mgo
