20. An atom has a mass of 50 and 20 protons. How many

neutrons does it have?

Answer:

In this scenario a battery is used to supply chemical potential energy. The potential energy is transformed and produces kinetic energy. The battery causes a fan to spin and that kinetic energy can also be described as mechanical energy.

How can the number of electrons be predicted in a neutral atom?

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Express (3 x 104) (4 x 1023) in scientific notation

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