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 each certain element. if one copper atom contains 29 protons, how many electrons are in 4 atoms of copper?

There are 116 electrons in four atoms of copper.

In a neutral atom, there is one electron for each proton.

No. of protons = 4 atoms Cu × (29 protons/1 atom Cu) = 116 protons

No. of electrons = 116 protons × (1 electron/1 protons) = 116 electrons

i know insulin is primary but i dont know the others im sorry

explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.