Periodic Table
Across
- 1. table / A table of the elements
- 3. / Has 1 proton
- 4. / What surrounds the nucleus in an electric cloud?
- 7. / Has the atomic number 70
- 9. / An element with the symbol 'Xe'
- 12. Number / The number of protons in an atom
- 14. / Positively charged subatomic particles
- 17. / Protons are found in the _______ of an atom.
- 19. / Columns on the periodic table
- 20. / The smallest unit of matter
- 21. Number / The number of protons in an atom
Down
- 2. Symbol / The symbol of an element
- 5. / Has an atomic mass of 261
- 6. / Has a mass number of 20
- 8. / Atomic mass is 55.85
- 10. / Subatomic particles with no charge
- 11. Number / The total number of neutrons and protons in the nucleus
- 13. / An element with 92 protons and electrons
- 15. / The atomic number is also the number of electrons in _______ atoms.
- 16. / Rows on the periodic table
- 18. Particles / The smaller parts that make up an object