Which subatomic particle identifies an atom as that of a particular element? how is this particle related to the atoms atomic number

The atom is identified by the number of protons it contains.

The number of protons in an atom is the z number, atomic number

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

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