Across
- 3. the smallest unit of matter that retains properties of an element
- 4. when two ions bond
- 7. particles electrons, neutrons, protons
- 9. carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur
- 10. has mass and takes up space
- 11. cant be broken by ordinary means
- 12. covalent bonds between atoms that differ in electronegativity
Down
- 1. equally shared electrons
- 2. 2 or more different elements combined in a fixed ratio
- 5. where protons and neutrons exist in an atom
- 6. the sharing of electrons
- 8. the shape of a molecule affects a molecules...
- 11. moves matter