Four elements, including ____, make up more than 96% of the mass of most living organisms.
A) sodium
B) potassium
C) phosphorus
D) nitrogen
E) calcium
Correct Answer:
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Q1: Hydrogen, atomic number 1, has 3 isotopes,
Q1: An oxygen atom has _ surrounding a
Q3: Q4: Radioactive _ is commonly used to treat Q5: A trace element is one found in Q7: Atoms with atomic numbers between lithium and Q13: Acid precipitation can have a pH as Q15: Proteins in thermophiles must be stabilized by Q17: The substance O2is considered to be _. Q18: Diluted acetic acid, CH3COOH, is commonly called![]()
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