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15 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Matter |
Anything that takes up space and has mass |
Space/mass |
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Element |
A substance that cannot be broken down to other substances by chemical reactions. |
Cannot be broken down |
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Compound |
A substance consisting of two or more different elements combined in a fixed ratio |
Fixed ratio |
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4 Essential Elements that make up 96% of living matter |
(O) Oxygen (C) Carbon (H) Hydrogen (N) Nitrogen |
(O)(C)(H)(N) |
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Remaining 4% of other elements accounted for organisms mass |
(Ca) Calcium (P) phosphorus (K) potassium (S) sulfur |
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Trace elements |
Required by an organism only in minute quantities. Such as (Fe) iron |
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Hemoglobin |
Molecule that carries oxygen in red blood cells |
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Atomic nucleus |
Center of an atom contain protons and neutrons packed together in a dense core |
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Dalton |
Atoms and subatomic particles measurement same as atomic mass unit or amu |
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Neutron and protons have a mass close to |
1 dalton |
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Mass number |
Sum of protons plus neutrons in the nucleus of an atom. |
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Mass number and atomic number written as a superscript to the left of an elements symbol |
Top=mass number Bottom=atomic number |
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Atomic mass |
Neutrons and protons have a mass very close to 1 dalton the mass number is an approximation of the total mass of an atom |
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For example 23 11 Na Atomic mass of sodium is |
23 daltons isoto |
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Isotopes |
Atoms given more neutrons than other atoms of the same element |
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