Periodic Table Crossword

5. has a mass of 14.045✕ 2
8. has one valence electron in row one
10. 8 valence electrons in row three
11. first discovered in space before being found on Earth, has 2 fewer protons than beryllium, has the highest ionization energy
13. has 6 neutrons, and has higher electron negativity than Helium, in the carbon group
14. Nobel gas with an atomic number of ten
15. Nonmetal With 17 electrons
18. has 3 more electrons than Hydrogen

1. mass of 24.31 in period 2
2. has 3 valence electrons, has a smaller atomic radius than Sodium
3. 13 neutrons and protons and is infinitely recyclable
4. group one with the largest atomic radius, alaki metal thats lighter then water.
6. has seven protons and neutrons and makes up about 78.1% of the Earth's atmosphere
7. nonmetal with nine protons
9. charge of -3
12. commonly found in batteries, element is a cation with a neutral parent atom with ionic radium that is smaller.
16. six valence electrons in period two
17. ends on 3p4