ANSWER: KR or Krypton has 36 protons
how we know that is because the atomic number of an element will ALWAYS be the same number of protons
for example if we have atomic number 79 for AU or gold then that tells you gold will have 79 protons
hope this makes since and helps :)
Answer:
67.5J
Explanation:
Work done = force x distance
45 x 1.5 = 67.5
Energy -- either in light or chemical form -- is also required for life. Both forms fuel the metabolic reactions that allow life to reproduce. Along with energy, we must make sure that any planet has a protective atmosphere that keeps the radiation from a sun out, while still keeping the planet warm.
Natural selection got rid of the light colored moths and helped the darker moths survive and become more abundant.