Periodic Table*

2. The basic particle from which all elements are made.
5. A one or two letter representation of an element on the periodic table.
7. The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
9. Elements that are usually dull in appearance, poor conductors of heat and electricity, gases at room temperature. Found on the right side of the periodic table.
13. table An arrangement of elements showing the repeating pattern of their properties.
15. A pure substance that cannot be broken down into simpler substances.
16. Vertical columns on the periodic table. Also called families. The elements have similar characteristics.
17. Positively charged particles inside the nucleus.

1. An element that has properties of both metals and nonmetals. On the periodic table are located along the zig zag line.
3. The particles of the nucleus that have no charge.
4. A horizontal rows of elements in the periodic table.
6. An element that is shiny and that conducts heat and electricity well
8. Non reactive gases found in group 18.
10. Negatively charged particles that move around the outside of the nucleus of an atom.
11. Center of an atom.
12. A group of 2 or more atoms bonded together.
14. The average mass of all the isotopes of an element. The total number of protons and neutrons of an atom.