Copper has an atomic number 29. That means that there are 29 protons in the nucleus of each copper atom. That's what the atomic number is; the number of protons in an atom of a certain element. If one copper atom contains 29 protons, how many copper atoms could you make out of 145 protons?

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2 August, 12:46

+5

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Karly · Answer 1

you can make 5 copper protons

I found out by taking 29 and multiplying by different numbers but you can also divide by 5.