Answer:
<u>B</u>
Explanation:
Planets have different year lengths because it depends how far they revolve from a celestial body. Each planet has its own orbital period. Planets closer to the star will have a lower orbital period compared to the ones that lie far away from it.
Answer: when in doubt go with B
Explanation:
The atomic number of an element is the number of protons the element has, so the element with the atomic number 55 has 55 protons.
The number of protons in an atom is represented by the atomic number.
hope this helps
