Periodic Table Crossword Puzzle
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15
Down:
1. number of neutrons plus number of protons
2. elements in group 7, non metals
3. father of the periodic table
6. horizontal rows with same number of
orbitals
7. vertical column of atoms that contain
similar properties
9. number of protons and electrons
12. particle in nucleus that has no charge
13. positively charged particle in nucleus
14. center of atom contains protons and
neutrons

Across:
4. elements in group 8 that have full valence
shells
5. scientist that developed the planetary model
8. electrons located on outermost orbital
10. negatively charged particle orbiting nucleus
11. elements that have properties of both
metals and nonmetals
15. elements on the left side of the periodic
table that have high melting points
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