A student dissolves 4 g of salt into 10 g of water. The total weight of the solution is 14 g. The student then heats the solution until all of the liquid turns into a gas and only the salt is left. The student is able to collect the evaporated gas. The student weighs the salt left over from the solution and the evaporated gas.How much should the student expect the salt and vapor to weigh?
OA 4g
OB 10g
OC 14g
OD 28g

In the middle of every atom is the nucleus. The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus

All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons.