When carbon and oxygen bond they do so by sharing electrons, but the electrons spend most of their time orbiting around oxygen. What type of bond forms between these two atoms?
covalent
ionic
polar covalent
hydrogen
The Correct Answer is C
A. covalent: This is too general. Covalent bonds involve shared electrons, but do not specify if sharing is equal or unequal.
B. ionic: Ionic bonds involve transfer of electrons, typically between metals and nonmetals. Carbon and oxygen share electrons.
C. polar covalent: A polar covalent bond involves unequal sharing of electrons. Electrons spend more time around oxygen because it is more electronegative than carbon.
D. hydrogen: A hydrogen bond is an intermolecular force, not a bond between carbon and oxygen atoms.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. the cell would not be able to undergo mitosis: Lysosomes are not required for mitosis. That’s handled by microtubules and centrosomes.
B. the cell would become filled up with junk and die: Lysosomes contain digestive enzymes to break down waste. If defective, cellular debris accumulates, which can lead to cell death (as in lysosomal storage diseases).
C. the cell would not be able to detoxify alcohol and would die: Peroxisomes, not lysosomes, detoxify alcohol.
D. the cell would not be able to move and would die: Cell movement involves cytoskeleton elements like actin and microtubules, not lysosomes.
E. the cell would not be able to produce energy and would die: Mitochondria, not lysosomes, produce cellular energy (ATP).
Correct Answer is C
Explanation
A. isotope; 27: The atomic number (27) refers to the number of protons, not neutrons. Isotopes have the same protons, different neutrons.
B. isomer; 33: An isomer is a different structural arrangement of the same molecules-not applicable here.
C. isotope; 33: Cobalt 60 is an isotope of Cobalt 59 (same protons, different neutrons).
Neutrons = mass number – atomic number = 60 – 27 = 33
D. isotope; 32: 60 – 27 = 33, not 32 neutrons.
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