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31 Cards in this Set
- Front
- Back
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Living things are made of |
Chemical compounds |
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Biologist need to understand |
The chemistry of life |
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Subatomic particles |
Protons neutrons electrons |
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The basic unit of matter |
Atoms |
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Atomos |
Unable to be cut |
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Protons are |
Positive |
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Neutrons have |
No charge |
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Electrons are |
Negatively charged |
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Protons and neutrons are located |
In the nucleus |
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Electrons are located |
Around the nucleus |
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Electrons are outside of the nucleus because |
Of energy of their motion |
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Positive and negative charges |
Balance out |
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Isotopes have the same |
Chemical properties |
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Chemical element |
A pure substance that consists entirely of one type of atom |
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Isotopes |
Atoms of the same element with different amounts of neutrons |
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Some isotopes are |
Radioactive |
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Chemical compound |
A substance formed by the chemical combination of two or more elements in definite proportions |
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Chemicals bonds |
Ionic covalent hydrogen |
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Ionic bonds |
When electrons are transferred |
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Covalent bonds |
When electrons are shared |
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Electrons travel around both nuclei forming |
A covalent bond |
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Molecules |
When atoms are joined by covalent bonds |
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Polar molecule |
Uneven distribution of charge one end is slightly positive and the other end is slightly negative |
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Universal solvent |
Water |
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Hydrophilic |
Dissolves in water |
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Hydrophobic |
Does not dissolve in water |
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Cohesion |
The attraction between molecules within a substance |
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Surface tension |
When hydrogen bonds form a skin because of cohesion |
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Adhesion |
The attraction of water molecules to other substances |
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Capillary action |
When water moves up a tube and into spaces |
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Meniscus |
Curved surface of water in tube |
