What must be true in order for an atom to absorb a photon?
A) The photon must have energy matching the difference in energy between two energy levels in the atom.
B) The atom must have lost all of its electrons.
C) The photon must have enough energy to remove an electron from the atom.
D) A or C
E) B or C
D) A or C
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What will be an ideal response?
Limestone may be made up of
A) fragments of granitic and andesitic rocks. B) animal bones. C) shell fragments from marine animals. D) plant debris.
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A) the breaking of chemical bonds B) the formation of chemical bonds C) photosynthesis D) nuclear fusion in the sun
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What will be an ideal response?