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

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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