Science 9 Unit B Chapter 2

Science 9 Unit B Chapter 2

Ms. Roussel

1

2 3

4 5 6

7

8 9

10 11

12 13 14 15

16

17

18 19 20

21 22

23 24

25

Across

4. U

7. Numbered 1 to 7 on the Periodic Table.

9. Each vertical column on the Periodic Table.

10. Elements are listed in order of this.

13. Discovered a useful way to organize elements.

17. Most stable elements.

18. Core of the atom.

19. The sum of the number of protons and neutrons in an atom.

21. Shiny, malleable, and ductile.

22. Neutral particles.

23. 6+ 2+ ion charge.

25. After Democritus's time, experiments where primarily carried out by.

Down

1. Te

2. Latin name for Cu.

3. Group 17

5. Diagonal row between metals and non-metals.

6. A 1770s French scientist

8. His was the "rasin bun model".

11. Most reactive metals.

12. Positively charged particles.

14. Dull and brittle.

15. First discovered subatomic particle.

16. The first chemists lived in this time.

20. Each element is composed of this particle.

24. 165 neutrons

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