Y9 Metals, Non-Metals And Semi-Metals (Metalloids) Template Page 4
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41. How are the densities of metal and non-metals different?
2. What is unusual about the conductivity of carbon?
3. Can you identify an element as a metal if it conducts electricity? Explain.
4. An element is grey, has a density of 0.5g/cm3, conducts electricity and heat. Is it a metal,
non-metal or semi-metal? Explain.
5. Complete the following equations:
a. ______________ + base à _______________ + water
b. Zn + H
SO
à ___________________ + ___________________
2
4
c. NaOH + HCl à ___________________ + ___________________
d. Potassium ___________ + __________ acid à K
SO4 + _______ + CO
2
2
6. Balance the following equations:
à _____Na
a. _____NaOH + _____ H
SO
SO
+ _____ H
O
2
4
2
4
2
+ _____ HCl à _____ KCl + _____ H
b. _____ K
CO
O + _____ CO
2
3
2
2
4
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