PERIODIC TABLE

1. A subatomic particle that has no electric charge. together with protons, account for the majority of average atomic mass. When atoms have the same number of protons—and hence are the same element
4. A substance made of two or more elements that have bonded chemically. These atoms are usually, but not always, joined in molecules.
5. a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.
8. a mark, sign, or word that indicates, signifies, or is understood as representing an idea, object, or relationship.
9. A group of atoms, usually but not always representing more than one element, joined by chemical bonds.

2. A substance made up of only one kind of atom, which cannot be chemically broken into other substances.
3. An atom or atoms that has lost or gained one or more electrons, thus acquiring a net electric charge.
4. a distinct compound or substance, especially one which has been artificially prepared or purified
6. The smallest particle of an element that retains all the chemical and physical properties of the element.
7. a chemical element that mostly lacks the characteristics of a metal. Physically, tends to have a relatively low melting point, boiling point, and density. it is typically brittle when solid and usually has poor thermal conductivity and electrical conductivity.