Across
- 2. Rows in a periodic table
- 3. Positive charge
- 4. Columns in a periodic table
- 7. Substance undergoes chemical reactions
- 8. Negative charge
- 10. the structure in a cell that contains the chromosomes.
Down
- 1. is the ability of an atom in a molecule to attract shared electrons
- 5. Measure of the size of an atom
- 6. They determine the characteristics of elements
- 9. Amount of energy required to remove an electron from an atom