Figure 1 shows a mug made of clay ceramic.
Figure 1
Which property of clay ceramic makes it suitable for use as a mug?
☐ | A | is brittle | |
☐ | B | is not transparent | |
☐ | C | does not conduct electricity | |
☐ | D | does not dissolve in water |
Figure 2 shows the properties of some materials.
material | property | |||
brittle | conducts electricity |
conducts heat |
transparent | |
clay ceramic | yes | no | no | no |
glass | yes | no | no | yes |
metal | no | yes | yes | no |
polymer | no | no | no | no |
Figure 2
Figure 3 shows an electrical cable.
The electrical cable is made of metal wire coated with another material.
The metal wire inside the electrical cable conducts electricity.
Figure 3
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☐ | A | atoms | |
☐ | B | electrons | |
☐ | C | neutrons | |
☐ | D | protons |
There are some concerns that nanoparticles may cause harm if they enter the human body.
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.
(1)
The volume of a nanoparticle of gold is 125 nm3
(1)
surface area to volume ratio = ................................... : 1
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