Figure 2 shows information about three different materials, a composite, a glass and a metal - Edexcel - GCSE Chemistry - Question 2 - 2020 - Paper 1
Question 2
Figure 2 shows information about three different materials, a composite, a glass and a metal.
| | a composite | a glass | a metal |
|-----------|---------... show full transcript
Worked Solution & Example Answer:Figure 2 shows information about three different materials, a composite, a glass and a metal - Edexcel - GCSE Chemistry - Question 2 - 2020 - Paper 1
Step 1
Explain which material in Figure 2 is the most suitable material to use in electrical circuits.
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Answer
The most suitable material to use in electrical circuits is the metal. This is because the metal is a good conductor of electricity, which is a crucial property for ensuring effective electrical conductivity in circuits.
Step 2
Nanoparticles are very small.
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Answer
To determine approximately how many times larger the radius of the nanoparticles is compared to the magnesium atom, we can set up the following calculation:
ext{Radius of nanoparticles} = 17 nm\
ext{Radius of magnesium atom} = 0.16 nm\
ext{Ratio} = \frac{17}{0.16} \approx 106.25\
This implies that the radius of the nanoparticles is approximately 100 times larger than the radius of the magnesium atom, which corresponds to option D.
Step 3
Calculate the surface area of the cube, in nm².
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Answer
To find the surface area of a cube, the formula is:
extSurfaceArea=6s2
Where (s) is the length of one side of the cube.
Given that (s = 9\text{ nm}):
extSurfaceArea=6×(9)2=6×81=486 nm2
Thus, the surface area of the cube is 486 nm².
Step 4
Give one possible risk of using nanoparticles.
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One possible risk of using nanoparticles is that they may pose health risks due to their small size, potentially leading to toxicological effects when inhaled or absorbed by the body.
