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Elements of the Human Body

The top 25 essential elements for the human body and their proportion of total body mass (%).
Please write the full chemical name, not it’s abbreviated symbol.
Source: Chemistry for the Biosciences: The essential concepts (Third Edition) by Jonathan Crowe & Tony Bradshaw
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grichard12
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Last updated: October 4, 2023
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First submittedOctober 4, 2023
Times taken20
Average score68.0%
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Proportion of total body mass (%)
Element
61
Oxygen
23
Carbon
10
Hydrogen
2.6
Nitrogen
1.4
Calcium
1.1
Phosphorus
0.2
Sulfur
0.2
Potassium
0.14
Sodium
0.12
Chlorine
0.027
Magnesium
0.026
Silicon
0.006
Iron
0.0037
Fluorine
0.0033
Zinc
0.001
Copper
0.0002
Manganese
0.0002
Tin
0.0002
Iodine
0.0002
Selenium
0.0002
Nickel
0.0001
Molybdenum
0.0001
Vanadium
0.00003
Chromium
0.00002
Cobalt
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