Across
- 4. A chemical reaction in which two compounds exchange positive ions and form two new compounds
- 6. A chemical reaction in which one element takes the place of another element in a compound
- 7. A chemical reaction in which electrons are transferred from one reaction to another
Down
- 1. A chemical reaction in which two or more substances react to form a single substance
- 2. A chemical reaction in which a substance reacts rapidly with oxygen, often producing heat and light
- 3. A chemical reaction in which a compound breaks down into two or more simpler substances
- 5. a substance that undergoes change into products over time