I learned that is a substances used to dissolve a . Its is of the amount. There are substances that can be dissolved in the given solvent, it is called . While the materials that can't be dissolved is called.

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