Periodic Table
Across
- 3. element to the right of nickel
- 5. element with the atomic mass 35.453
- 7. element with the chemical symbol K.
- 11. element named after a planet
- 12. an element with the atomic number 47
- 13. the number of elements in the periodic table.
- 15. the periodic ______.
- 16. another particle that exists in the nucleus of an atom
- 18. element to the left of cobalt
Down
- 1. an element below silver
- 2. positively charged particles in an atoms nucleus
- 4. element with the chemical symbol Na
- 5. symbol an element goes by
- 6. the smallest particle that can still be considered an element
- 8. element with the atomic number 18
- 9. an isotope is identified by its ______.
- 10. the elements are organized by their atomic _______.
- 14. an atom with the same number of protons and different numbers of neutrons.
- 17. element with the atomic number 28