Across
- 5. Group 2A elements in the modern periodic table
- 7. The weighted average mass of the isotopes of that element
- 8. An ion that has a negative charge
Down
- 1. Radiation that is made up of alpha particles
- 2. The number of protons in an atom
- 3. A particle with two protons and two neutrons, with a 2+ charge
- 4. The number 6.022x10^23, which is the number representative particles in a mole
- 5. Group 1A elements, except for hydrogen, that are on the left side of the modern periodic table
- 6. States that equal volumes of gases at the same temperature and pressure contain equal numbers of particles