Answer:
1. The mass on the periodic table.
Average atomic mass
2. Particles that differ in number between isotopes.
Neutrons
3. Vertical column in the periodic table.
Group
4. Atoms of the same element that have different masses.
Isotopes
5. All elements in the same one of these has the same number of energy levels in their electron cloud.
Period
6. The smallest form of matter that still retains the properties of an element.
Quark
Explanation:
Answer: 30mL
(2.5)(x)=(5.0m)(15mL)
x=30mL
it soaks up waterrrrrrr
Run Off
Answer: A chemical reaction that stores energy is called an endothermic reaction. More energy might be released as products form than the energy needed to break the reactants apart.