1. Given an element's atomic number and mass number, how can you tell the number of protons and neutrons in its nucleus? Number of protons = mass number; number of neutrons atomic number - mass number
Number of protons = atomic number; number of neutrons = mass number + atomic number
Number of protons = atomic number; number of neutrons = mass number - atomic number

last one. c

Explanation:

atomic number; number of neutrons = mass number - atomic number is the very important to find the number of the question.

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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