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6. What can you tell from an element by which period it's in?
- The mass of the element
- If it's a lustrous element
- The number of electron shells it has
- The number of electrons in its' outer shell
7. What ratio do these react in? Be + F
8. What ration do these react in? Li + O
9. Difference in appearance of iron and sulfur
- Iron (grey, small, sharp filings), Sulfur (yellow powder)
- Iron (grey powder), Sulfur (red powder)
- Iron (yellow powder), Sulfur (grey. small, sharp filings)
- Iron (rusty, copper-like filings), Sulfur (yellow gas)
10. What ratio do these react in? Na + O
11. The sum of the protons and neutrons in the nucleus is...
- The relative atomic mass
- The mass number
- The proton number
- The atomic number
12. Which metals are magnetic?
- Silver, iron, aluminium
- Iron, nickel, cobalt
- Copper, iron, magnesium
- Iron, magnesium, sodium
13. What is the relative mass of an electron?
14. What ratio do these reaction in? Ca + O
- 1:1 (CaO)
- 2:2 (2CaO)
- 1:2 (CaO2)
- 2:1 (Ca2O)
15. What is the overall charge of an atom?
- Positive charge
- Charge is too small to measure
- No charge/ neutral charge
- Negative charge
16. Non-metals like sulfur, phosphorus and nitrogen oxides turn universal indicator what colour? Showing what?
- Red- showing they form basic oxides.
- Red- showing they form acidic oxides.
- Blue- showing they form basic oxides.
- Blue- showing they form acidic oxides.
17. Define a compound
- A mixture made of two or more different elements.
- A substance made of two or more of the SAME elements, chemically combined in fixed positions.
- A substance that is made up of two or more DIFFERENT elements and chemically combined in fixed positions.
- A substance made of two or more different elements that aren't chemically combined.
18. What can you tell from an element by which group it's in?
- The number of neutrons in its' nucleus
- The number of electrons in its' outer shell
- The number of electron shells it has
- The relative charge
19. What is the electron configuration of nitrogen?
20. Roughly, how does the size of the atom compare to the size of its' nucleus?
- 200,000 times smaller
- 20,000 times bigger
- 20,000 times smaller
- 2,000,000 times bigger