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Stack #21843
Basic Chemistry-Body Structure and Function
| Question | Answer |
|---|---|
| Matter | anything that occupies space and has weight |
| element | a fundamental substance that cannot be broken down into a simpler form by ordinary chemical means |
| What four elements makes up the human body | carbon, hydrogen, oxygen, and nitrogen |
| atom | basic unit of matter |
| An atom is composed of three subatomic particles | neutrons, protons, and electrons |
| isotope | has the same atomic number but a different atomic weight |
| The inner electron holds how many electrons? | two |
| Outer electron shells hold how many electrons? | eight |
| ionic bonds | formed as electrons are transferred to stabilize the shells of the atom |
| covalent bonds | formed as the electrons of the outer shells are shared by the interacting atoms |
| hydrogen bonds | intermolecular bonds and do not involve transfer, or sharing, of the electrons |
| cation | positively charged ion |
| anion | negatively charged ion |
| molecule | a substance formed from two or more atoms |
| compound | a substance that forms when two or more different atoms bond |
| acid | an electrolyte that dissociates into hydrogen ion |
| base | neutralizes an acid by producing a salt and water |
| a pH of 7 | neutral |
| a pH of 12 | base |
| a pH of 4 | acid |
| The six forms of energy | mechanical, chemical, electrical, radiant, thermal, and nuclear |
| Transfers energy from one chemical substance to another | ATP |
Created by:
katyrn
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