What should can i write in this question the answer is down but i want it as a paragraph

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

They can measure  the amount of energy gained or lost

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other