  The mass number (total number of protons and neutrons) of copper is 64 and the atomic number (number of protons) of copper is 29. The number of electrons is the same as â¦ the number of protons. So if the number of protons is 29, then so is the number of electrons. The mass number (total number of protons and neutrons) of copper is 64 and the atomic number (number of protons) of copper is 29. The number of electrons is the same as â¦ the number of protons. So if the number of protons is 29, then so is the number of electrons.
millionaire-a person whose material wealth is valued at more than a million dollars. have, rich person, wealthy person-a person who possesses great material wealth.
âº to be the largest or most noticeable âpart of something: The âdispute is likely to dominate the âmeeting.male-/female-dominated She is a powerful âfemale figurehead in a very male-dominated âindustry. domination noun [U] âº the âgrowing domination of âelectronic âmedia in our âlives. noun [U].