Across
- 2. A horizontal row of elements on the periodic table.
- 3. A change that does not result in a new substance being formed. It can be reversed.
- 5. A reaction where a chemical change occurs.
- 8. Smallest particle of a chemical element than can exist.
- 9. Group of atoms bonded together by sharing electrons.
- 10. A substance made from one type of atom.
Down
- 1. A change where new substances are formed. This can't easily be reversed.
- 4. A vertical column of elements on the periodic table.
- 6. Two or more different elements chemically combined.
- 7. an atom or group of atoms with an electrical charge, formed by the loss or gain of electrons.