Across
- 1. Each vertical column of the periodic table
- 4. Negatively charged subatomic particles
- 5. The number of protons in the nucleus of the atom
- 6. atoms of the same element that have the sam atomic number but different atomic masses due to a different number of neutrons
- 9. Subatomic particles with no charge but with a mass nearly equal to that of a proton
- 10. The smallest particle of an element that retains its identity in a chemical reaction
Down
- 2. Positively charged subatomic particles
- 3. An arrangement of elements in which the elements are separated into groups based on a set of repeating properties
- 7. Each horizontal row of the periodic table
- 8. number The total number of protons and neutrons in an atom
