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