According to the kinetic-molecular theory, what is the most significant difference between solids, liquids, and gases? the distance between the particles

the mass of each particle

the shapes of the particles

the type of collision that occurs between particles

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom