Carbon-12 and carbon-14 are isotopes. How are they different from each other?
A) different numbers of protons
B) different numbers of neutrons
C) different numbers of electrons
D) they can form different numbers of chemical bonds
E) different number of energy shells
Correct Answer:
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Q2: Of these major ions found in the body,which
Q4: Carbohydrates:
A) have carbon and oxygen atoms in
Q5: Which is true about the composition of
Q6: Which describes a characteristic of free radicals?
A)They
Q7: What directly determines an atom's identity?
A) the
Q8: When magnesium loses electrons to become an
Q10: Ions are
A) electrically neutral.
B) electrically charged.
C) formed
Q11: Which is a covalent bond?
A) two atoms
Q14: Which best describes a hydrolysis reaction?
A)Molecules are
Q14: Most of the body weight of an
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