An atom's valence electrons are those electrons that have the highest energy.
The reactivity of a metal depends on how easily it loses its valence electrons.
Within each period in the periodic table, elements have similar properties because they have the same number of valence electrons.
The chemical bond formed when two atoms share electrons is called an ionic bond.
Covalent bonds usually form when a nonmetal combines with a metal.
If a molecule contains polar bonds, the molecule may or may not be polar overall.
The forces between molecules are much stronger than the forces between ions.
Water boils at 100°C. This is an example of a chemical property.
Substances that enter into a chemical reaction are called products.
The ability to react with oxygen is an example of a chemical property.
Which of the following is true about chemical reactions?
In an endothermic reaction, energy is
A reaction that has two compounds as reactants and two compounds as products is most likely a