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 5 atoms of copper?

Answer 1

145 Electrons

Step-by-step explanation:

The number of protons is equivalent to the number of Electrons.

if 1 atom Cu = 29 proton

and Number of proton = Number of Electron

Hence, 1 atm Cu = 29 Electrons

5 atom Cu = X

crosss multiply

x = 145electron in 5 atom of CU