Answer:
Similarities:
Both are based on developments in quantum mechanics, both involve a centrally located mass of protons and neutrons (nucleus)
Differences:
nucleus: Electrons distinct and follow a definite orbit around nucleus
Cloud: No definite orbit for electrons around nucleus, only probability distributions of where electron is likely to be.
Since it travels at 21,000 kilometers per hour, you'd just multiply that with 3.5 to get 73,500. So your answer is 73,500.
<span>The different colors of visible light have different wavelengths.
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The answer is frame of reference ( system ).
Frame of reference <span>is a physical concept related to state of motion.
hoped it helped!!</span>
