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19 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Two more atoms that share one or more pairs of electrons |
Covalent Bond |
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The smallest unit of matter that still retains the properties of the element |
Atom |
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The attraction betwwen oppositely charged elements |
Ionic Bond |
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Weak attractions between polar molecules |
Hydrogen bond |
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The number of protons in an atom |
Atomic Number |
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Substance that cannot be broken down into other substances by chemical reactions |
Elements |
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What are isotopes? |
Elements with varrying numbers of neutrons |
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What is the smallest level of biological organization that can display all the characteristics of life? |
A cell |
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Around 96% of the human body is composed of...? |
Carbon, Hydrogen, Oxygen, Nitrogen |
NOCH |
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True or false? Of the naturally occurring elements, only 17 of them are essential to people. |
False |
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Energy-rich chains of carbon and hydrogen |
Hydrocarbons |
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Any substance that can be dissolved |
Solute |
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Molecules that have the same molecular formula but different structures |
Isomers |
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A substance that is the dissolving agent to another substance |
Solvent |
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Groups of atoms directlly involved in chemical reactions |
Functional Group |
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A liquid consisting of a homogeneous mixture of two or more substances |
Solution |
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What are the four main classifications of large biological molecules? |
Carbohydrates, Lipids, Protiens, and Neuclaic Acids |
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What are the four unique properites of water? |
-Cohesivie Nature -Moderate Temperature -Biological Signifigance of Ice -Versatility as a solvent |
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What is a buffer? |
Substances that minimize changes in pH by accepting H+ when ion is in excss and donation when h+ is depleted |
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