Across
- 5. Central part of the atom.
- 7. A type or covalent bonding where there is unequal sharing of electrons
- 11. It helps predict bond types.
- 12. Anything that has mass and takes up space.
- 13. Created the very first atomic theory.
- 15. Are elements that have properties of both metals and nonmetals.
- 16. The basic unit of matter.
- 19. Showed that the atom was made of even smaller things
- 20. A type or covalent bonding where an equal sharing of electrons occur.
Down
- 1. What elements in group 18 are called.
- 2. Proposed that the matter could not be divided into smaller pieces forever.
- 3. What elements in group 17 are called.
- 4. Discovered protons and nucleus.
- 6. Part of the atom that has negative charge.
- 8. A chemical bond that involves sharing of electron pairs between atoms.
- 9. A substance made up of two or more different elements chemically bonded together.
- 10. When atoms give and take electrons, creating charged particles that stick together.
- 14. Have strong energy attractions
- 17. Developed Rutherford's model with energy levels and electron orbits.
- 18. Formed after a metal atom transfer it's Valence Electron to non-metal atom.