Across
- 3. vertical column of elements on the Periodic Table that have similar physical and chemical properties
- 4. A chemical reaction in which heat is released and usually feels warm when the heat is released from the reaction
- 6. that have some properties of metals and non-metals and are found along the zigzag on the Periodic Table
- 7. A chemical reaction that requires an input of energy and usually feels cold when it absorbs heat in the reaction
- 8. Electron electrons on the outermost energy level of an atom that determine the reactivity of the atom
Down
- 1. states that matter is neither created nor destroyed in ordinary chemical and physical changes
- 2. Bond an interaction that holds atoms together
- 5. horizontal row of elements on the Periodic Table that have the same number of electron shells