Across
- 5. molecular compound of 2 hydrogen and 2 oxygen atoms
- 7. how are the elements arranged in the periodic table
- 9. 2 or more elements sharing electrons
- 12. particle with an electric charge of positive or negative
- 14. center of atom where the proton and neutron are
- 15. mostly on the right side of the periodic table
- 17. size of atom
- 19. the shape to identify the container is dangerous
- 22. who came up with the particle theory
- 23. calcium reacting with sodium produces
- 24. the product can burn skin or eyes on contact
- 26. a pure substance that can not be broken down simpler
- 28. a vertical line of elements on the periodic table
- 29. molecular compound of 1 hydrogen and 2 oxygen atoms
- 30. a horizontal line of elements
Down
- 1. outermost shell of an atom
- 2. positively charged particle.
- 3. when metal reacts with a non metal
- 4. proposed the plum pudding model
- 6. subtract mass number and atomic number Density mass divided by volume
- 8. one type of particle
- 10. calcium reacting with fluorine produces
- 11. separation of mixture with different boiling points
- 13. has properties of metal and non metals
- 16. very reactive metals
- 18. non reactive non metals
- 20. Canada’s standard for communicating info about hazardous workplace products
- 21. pure substance that contains 2 or more elements in a fixed ratio
- 25. the shape to identify the product is dangerous
- 27. matter that contains 2 or more different types of pure substances