Year 8 Science · Unit 2 · Lesson 15
Foundation Worksheet
Learning Goals
Match each element to its property and use
Draw a line connecting each element on the left to its correct property/use on the right. Or write the matching letter next to each element.
| Element | Your answer | Property / Use |
|---|---|---|
| Copper (Cu) | A. Very light gas that does not react; used in party balloons because it is less dense than air | |
| Helium (He) | B. Metalloid semiconductor; used in computer chips and solar panels | |
| Chlorine (Cl) | C. Ductile metal that conducts electricity extremely well; used in household wiring | |
| Silicon (Si) | D. Lightweight metal; used in aircraft frames and drink cans | |
| Aluminium (Al) | E. Reactive halogen non-metal; added to drinking water to kill harmful bacteria | |
| Carbon, diamond (C) | F. Hardest naturally occurring substance; used in drill bits and cutting tools |
Sort it!
Write each element from the pool into the correct category box below. Use what you know about metals, non-metals and metalloids from the periodic table.
Would conduct electricity well
Would NOT conduct electricity
Might conduct electricity (semiconductor)
1. Name two features from the periodic table that tell you whether an element is a metal or a non-metal, and give one example of each.
2. Explain why helium is used in balloons instead of hydrogen, using the category and group position of each element.
Wrap Up
In one sentence, what was the main idea of this lesson?