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Cards In This Set
| Front | Back |
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Element
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-simplest form of matter with unique chemical chemical properties
-represented by 1 or 2 letter symbols -Chemical elements can not be broken down |
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Atomic number
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Number of protons in the nucleus
|
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Periodic table
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Table in which elements are arranged in order by their atomic number
|
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Elements with biological roles
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24 out of 91 elements contribute to normal physiological roles in human
|
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Elements with biological roles divided in to 3 roles
|
-major
-lessor -trace |
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Major biological elements
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6 out of 24 account for 98.5% of the body weight
(oxygen, carbon, hydrogen, nitrogen, calcium, phosphorus) |
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Lessor biological elements
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6 out of 24 account or 0.8% of body weight
(sulfur, potassium, sodium, chlorine, magnesium, iron) |
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Trace biological elements
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12 out of 24 account for 0.7% of body weight
|
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Sulfur
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S
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Potassium
|
K
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Sodium
|
Na
|
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Chlorine
|
Cl
|
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Magnesium
|
Mg
|
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iron
|
Fe
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Oxygen
|
O
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