dat 2007 errors?

Started by skim1988
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skim1988

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67. The electronic configuration of a particular neutral atom is
1s2 2s2 2p6 3s2 3p2. What is the number of unpaired electrons in this atom?

Answer key says 3 but isn't it 2?
 
13. Which is the smallest organelle in the cell?

Answer key says ribosome but ribosome isn't an organelle right? because prokaryotes have ribosomes and prokaryotes don't have any organelles.