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kekebab001 kekebab001
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6 years ago
The four atoms that comprise more than 99 of the atoms in the human body are:
 a. hydrogen, carbon, oxygen, nitrogen
  b. carbon, oxygen, phosphorus, sulfur
  c. nitrogen, oxygen, calcium, iron
  d. carbon, hydrogen, sodium, potassium
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cotdiyeacotdiyea
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6 years ago
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kekebab001 Author
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6 years ago
Smart ... Thanks!
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Yesterday
this is exactly what I needed
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2 hours ago
Brilliant
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