| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.64 |
| Score | 0% | 73% |
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
proton |
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neutron |
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electron |
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atom |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
When light travels between two substances it bends. This is called:
refraction |
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convection |
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reflection |
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conduction |
Because different materials have different refractive indices, light changes speed when passing from one material to another. This causes the light to bend (refraction) at an angle that depends on the change in refractive index between the materials. The greater the difference, the higher the angle of refraction.
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
isotopes |
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ions |
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reactants |
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products |
The atomic mass of an element listed in the Periodic Table represents the average mass of a single atom of that element and is measured in atomic mass units (amu). This number is an average as some elements have isotopes with atoms that vary in their number of neturons and, therefore, differ in weight.
In the metric system, what prefix represents 10-3?
mega |
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kilo |
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centi |
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milli |
In the metric system, milli is the prefix for 10-3.
An element in the physical state of __________ maintains a constant volume and shape.
gel |
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solid |
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liquid |
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gas |
An element in a solid state has atoms or molecules that are constricted and do not move freely. Solids maintain a constant volume and shape and exist at a lower temperature than liquids or gases.