The primary elements making up living organisms are
A) carbon,hydrogen,oxygen,and calcium.
B) carbon,oxygen,iron,and chlorine.
C) carbon,hydrogen,iron,and calcium.
D) carbon,hydrogen,oxygen,and nitrogen.
E) carbon,oxygen,sulfur,and calcium.
Correct Answer:
Verified
Q2: In a chemical equation
A) the reactants are
Q4: Isotopes of the same element are different
Q13: In a covalent bond
A) atoms share electrons.
B)
Q14: The atomic number of an atom or
Q15: If you were told to sort cards
Q15: A base
A) has a value of 7
Q18: An acid
A) has a value above 7
Q18: As part of an exam,you are given
Q20: If an atom has a valence shell
Q21: You are asked to help solve a
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