Across
- 4. mass / volume = -?-
- 6. The element in period 3, group 13
- 7. In a -?-, all elements have similar number of energy levels
- 8. the sum of the protons and neutrons in the nucleus of an atom
- 9. The formula of this molecular compound is CO2
- 12. A pure substance that can’t be broken down into simpler substance
- 13. The element in period 4, group 2
- 14. The transition of a substance directly from the gas to the solid state
- 15. A negatively charged ion (after gaining electrons)
- 16. The transition of a substance directly from the solid to the gas state
- 18. The formula of this ionic compound is Li₂S
- 22. The most reactive metals
- 24. A mixture where different substance are not visible (only 1 phase)
- 25. In a -?-, all elements have similar number of valence electrons
- 26. Have properties of both metal and non-metal
- 29. The molecular compound formed when hydrogen and oxygen is sharing electrons(the answer is the formula)
- 30. The elements in this group have a full valence shell
- 31. A pure substance that contains 2 or more elements in a fixed ratio
Down
- 1. An electron in the outermost shell
- 2. Ability of a substance to react with oxygen
- 3. Using what you already know to make an educated guess about what will happen
- 5. Sodium chloride, calcium fluoride, magnesium oxide
- 9. A positively charged ion (after losing electrons)
- 10. The ability to be stretched into a wire
- 11. A mixture where different substance a visible (more than 1 phase)
- 17. The ionic compound formed when sodium reacts with chloride (the answer is the formula)
- 19. Carbon dioxide,dinitrogen monoxide,hydrogen peroxide
- 20. The WHMIS symbol for products that could cause skin burns and serious eye damage
- 21. A metal’s capability to be hammered into a sheet
- 23. Atoms of the same element that have different number of neutrons
- 27. The most reactive non-metals
- 28. the creator of the plum pudding model