How many electrons does nitrogen have?
14
15
none of the above

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

What are the similarities of physical and chemical change ?

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.