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