Answer: distance to epicenter: 7600 km, s-wave travel time: 20 minutes
Answer:
a. The number of neutrons in the nucleus
Explanation:
Having more protons or electrons would change the charge of the atom making it an ion. Neutrons have no charge so the overall charge of the atom is not affected; neutrons also have a relative mass of 1 which is why there are different isotopes.
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What you have to do is balance the chemical equations to make sure everything is even on both sides. If you want me to help you answer the questions comment back