| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.92 |
| Score | 0% | 58% |
In which type of compound does one atom borrow an electron from another atom?
chemical |
|
covalent |
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ionic |
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acidic |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
In the metric system, what prefix represents 103?
kilo |
|
centi |
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milli |
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mega |
Kilo is the metric system prefix for 103.
In the Periodic Table of the Elements, atomic number is equal to which of the following?
number of protons in the nucleus |
|
number of electrons orbiting the nucleus |
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number of protons + neutrons in the nucleus |
|
number of neutrons in the nucleus |
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.
In the classification of life, which of the following is not a domain?
archaea |
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bacteria |
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animalia |
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eukaryota |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
During digestion, after proteins are broken down where does the undigested food go next?
stomach |
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esophagus |
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small intestine |
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large intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.