Across
- 3. The most important among the 6 essential elements
- 6. molecules attracted to water
- 9. Positively charged ion
- 10. the weakest type of bond
- 12. central part of an atom that has protons and neutrons
- 13. outer electrons involved in chemical bonding
- 16. negatively charged ion
- 17. atoms of the same element with different number of neutrons
- 21. number of electrons in the first shell
- 22. reaction that absorbs energy from its surroundings
- 23. substance in which a solute is dissolved
- 24. biological catalysts that speed up chemical reactions
Down
- 1. subatomic particle with negative charge
- 2. type of bond involving complete electron transfer
- 4. molecules repelled by water
- 5. uneven distribution of charge in a molecule
- 7. bond involving shared electrons
- 8. macromolecule that serves as the primary energy source
- 11. macromolecule that serves as genetic material
- 14. reaction that releases energy to its surroundings
- 15. type of bond responsible for water to connect with water
- 18. subatomic particle with a positive charge
- 19. Mnemonic for knowing protons, neutrons, and electrons
- 20. building blocks of polymers