Across
- 1. ion with a positive charge
- 3. A free element replaces another in a compound. A + BC --> AC + B
- 4. a lasting attraction between atoms
- 5. a bond between two nonmetals. A bond when electrons are being shared.
- 9. a chemical reaction accompanied by the absorption of heat.
- 11. an atom that is missing or gains extra electrons and has a negative or positive charge
- 12. the number that represents how many molecules in a chemical equation
- 15. when bonds between atoms are broken and created to form new molecules.
- 17. when one compound splits into two or more substances. AB --> A + B
- 18. a chemical reaction that releases energy in the form of heat or light
Down
- 1. a way to describe what goes on in a chemical reaction
- 2. the substance that undergoes a chemical change. It is written on the left side of the chemical equation.
- 6. electrons in the most outer shell of an atom
- 7. when two different elements combine to form a more complex substance. A + B --> AB
- 8. the small number that represents how many atoms of the element in a chemical formula
- 10. the parts of two different compounds switch places with one another to form two new compounds. AB + CD --> AD + CB
- 13. the result of a chemical change. It is written on the right side of the chemical equation.
- 14. ion with a negative charge
- 16. a bond between a metal and nonmetal. A bond where electrons are being transferred.