Chemistry

30 June, 09:05

About 20-25% of the 92 natural elements are known to be essential to life. which four of these elements make up approximately 96% of living matter?

a. carbon, sodium, hydrogen, nitrogen

b. carbon, oxygen, phosphorus, hydrogen

c. oxygen, hydrogen, calcium, nitrogen

d. carbon, hydrogen, nitrogen, oxygen

e. carbon, oxygen, nitrogen, calcium

+4

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