They discovered that *elements* show increase in atomic numbers across the period.
Answer:
The answer is B. Compressions and rarefactions.
Explanation:
- <u><em>Longitudinal sound waves are waves of alternating pressure deviations from the equilibrium pressure, causing local regions of compression and rarefaction.</em></u>
Answer:
Avogadro's number is 6.022* 10^23
