Across
- 2. Unit for atomic mass
- 3. Discovered the nucleus using gold foil experiment(last name)
- 5. Negatively charged particles found outside nucleus
- 6. _____number is equal to the number of protons
- 8. Acids always have at least one ______ atom
- 9. _____particle emission is when a helium nucleus is given off
- 12. Hydrogen is a ______
- 13. The elements in group 1 of the periodic table are ______ metals
- 15. Discovered the electron using cathode ray tube(last name)
- 17. Positively charged ions
Down
- 1. Arsenic is a ______
- 2. Smallest particle of an element that can enter into a chemical reaction
- 4. Beta emission produces a/an ______
- 6. Negatively charged ions
- 7. ______ number is found by adding the number of protons and neutrons
- 8. Elements in group 17 of the periodic table are called ______
- 10. Polonium is a ______
- 11. Gamma radiation emits ________
- 14. Atom containing same number of protons but not neutrons
- 16. Positively charged particle found in nucleus