I need help understanding how to do the problems with these in the link. What I mean is I need help understanding what each number represents and what to subtract or put in for the answer. 1. a) b) c) d) e)

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If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom