Across
- 6. Biological macromolecules have a backbone composed of long chains of this elelment.
- 9. When two similar molecules stick together, this is called _______.
- 10. Located on the right side of a chemical equation.
- 11. The "universal" solvent necessary for life.
- 12. Located on the left side of a chemical equation.
- 15. A neutral subatomic particle that is located in the nucleus.
- 16. A negatively charged particle.
- 18. This type of chemical reaction requires energy.
- 21. A charged particle.
- 22. A subatomic particle that orbits the nucleus and has a negative charge.
- 23. A substance that results from the combination of two or more elements.
Down
- 1. A column in the periodic table is referred to as a _______.
- 2. Atoms are most stable when their _______ shells are complete.
- 3. When two different molecules stick together, this is called _______.
- 4. A row in the periodic table is called a _______.
- 5. Water has high surface tension due to these types of binds.
- 7. A group of two or more atoms that share electrons in a chemical bond.
- 8. Atoms of the same element, but with different atomic masses.
- 10. A subatomic particle located in the nucleus. It has a positive charge.
- 13. This type of chemical reaction releases energy.
- 14. The smallest unit of a chemical element.
- 17. In _______ bonds, atoms of opposite charges are attracted to each other.
- 19. In this type of bond, atoms may equally or unequally share electrons.
- 20. A positively charged particle.