Answer:B
Explanation: an atom is the smallest particle of an element that can take part in a chemical reaction.
Answer:
I think its distance
Explanation:
when measuring how far a p.o art u can use mm
<span>The distance between wave crests is called wavelength. It is a characteristic shared by waves of all kinds, including ocean waves and sound waves. Wavelength is measured from the highest point, or summit, of one wave's crest to the summit of the next wave's <span>crest</span></span>
<span><span>hope this helps</span></span>
