Question

Copper has an atomic number of 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 ELECTRONS are there in in 3 atoms of copper?

Answer 1

the awnser is 87 hope this helped

Answer 2

Yeah basically, you just have to multiply the protons (29) and the number of atoms of copper (3) together. So, 29 times 3 is equal to 87.