Across
- 4. Radiation- Radio waves, microwaves, infrared waves, visible light, ultraviolet waves, x-rays, and gamma rays
- 6. ions- Consists of a single atom with a charge resulting from the loss or gain of one or more valence electrons
- 10. ions- Compounds of more than one atom, acts as a unit, and carries a charge
- 13. Bonds- Compounds that are held together by the sharing of electrons
- 15. -a mix of metal and non-metal
- 16. Covalent- A covalent bond between atoms in which the electrons are shared unequally
- 17. Theory - The repulsion between electron pairs causes molecular shapes to adjust so that valence electron pairs stay as far as possible
- 19. Gases- Group 8A Also called inert gases because they rarely take part in reactions
- 20. Bonds- The forces of attraction between the free floating valence electrons an the positively charged metal ions; These bonds hold metals together
Down
- 1. - the vertical rows on the periodic table
- 2. - The ability of atoms of an element to attract electrons when the atoms is in a compound
- 3. -a column of elements in the periodic table of the chemical elements (vertical column)
- 5. Covalent Bonds- Two atoms held together by sharing three pairs of electrons
- 7. -bad conductors of heat and electricity; Brittle; low luster (Dull)
- 8. Covalent Bond- One in which one atom contributes both electrons
- 9. Metals - Group IA
- 11. Numbers- The number of ions of opposite charge that surround the ion in a crystal
- 12. - horizontal Rows
- 14. Earth Metals- Six chemical elements in group 2 of the periodic table
- 18. Molecule- Are attracted to another