Across
- 5. a stable subatomic particle occurring in all atomic nuclei
- 6. when atoms are shared unequally in a covalent bond
- 8. action or process of adhering to a surface or object.
- 10. THE BASIC UNIT OF LIFE
- 11. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons
- 12. formed from the electrostatic attraction between oppositely charged ions in a chemical compound.
- 13. a subatomic particle of about the same mass as a proton but without an electric charge
- 14. a stable subatomic particle with a charge of negative electricity
Down
- 1. a thing that is composed of two or more separate elements
- 2. when the bonded atoms have a lower total energy than that of widely separated atoms
- 3. action or fact of forming a united whole
- 4. a type of chemical bond that is formed when electrons are shared equally between two atoms.
- 7. a pure substance
- 9. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei