The answer is letter d. it has only 2 electrons in its first shell and 4 in the second shell. Basing from the electronic configuration of the carbon atom, the "s" orbital of carbon atom is completely filled leaving now the "p" orbitals partially filled. Thus in this case, carbon atom has four (4) valence electrons.
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C) due to the fact that everyone needs to know. Not everyone listens to publications by scientist unless it's on the news aka public broadcast media.
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3 years isnt as much as others out there
