Potassium is an alkali metal with the chemical symbol K. It has an atomic number of 19, meaning that it has 19 positively charged protons. It also contains 19 electrons, which have a negative charge, and 20 neutrons, which do not hold a charge
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Water is made of only one molecule which can be chemically separated into hydrogen and oxygen. The answer is D.
B, the opposing forces are the same, thus, the ball doesn't move back or forward.
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