CAN SOMEONE PLEASE HELP ME I DON’T UNDERSTAND :(

How many atoms are there in 5.70 mol of mg

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

What is formed when amino acids form long chains or polymerize