Answer:
Mass by mass
Explanation:
Because it's telling only about mass in grams
Elements in the same group<span> in the </span>periodic table<span> have </span>similar<span> chemical properties. This is because their atoms have the </span>same<span> number of electrons in the highest occupied energy level. </span>Group<span> 1 </span>elements<span> are reactive metals called the alkali metals.</span>Group<span> 0 </span>elements<span> are unreactive non-metals called the noble gases.</span>
They speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.
I think it’s b but I could be wrong
A flight simulator that helps astronauts prepare for a shuttle launch is an example of a Scientific Model.
