The four elements that make up more than 96% of the weight of living organisms are oxygen, carbon, hydrogen and calcium.
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Q1: An oxygen atom has _ surrounding a
Q2: Ice floats in liquid water because there
Q5: A trace element is one found in
Q6: The smallest unit that retains the chemical
Q11: In the representation of hydrogen gas, H-H,
Q12: The substance H2O is considered to be
Q13: Acid precipitation can have a pH as
Q15: Proteins in thermophiles must be stabilized by
Q17: The substance O2is considered to be _.
A)
Q19: The polarity of water allows it to
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