Answer:Kinetic floor tiles capture energy generated when people walk on them.
Explanation:
Answer:
D. Protons ; neutrons.
Explanation:
For a given element the number of protons is fixed, but the number of neutrons differ because the element usually consist of a number of isotopes.
For example Carbon has isotopes which contain 12, 13 and 14 neutrons.
So that is why you average the number of neutrons to find the approximate atomic mass..
As the pure element (or as an elemental mixture), or chemically bound to other elements<span> in a compound. Hope this helps!</span>
