Because of Some Troubling Thoughts,Carl Recently Had a PET Scan

question 40

Multiple Choice

Because of some troubling thoughts,Carl recently had a PET scan of his brain that revealed excessive activity in the anterior cingulate area. Carl's psychiatrist believes that Carl suffers from

• A)schizophrenia.
• B)a phobia.
• C)a personality disorder.
• D)obsessive-compulsive disorder.

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Definitions:

Valence

Refers to the combining power of an element, especially in terms of the number of hydrogen atoms it can bond with or displace to form a compound.

Lewis Structure

A diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Molecular Formula

A representation of the number and type of atoms in a molecule using symbols and numerical subscripts.

2s Orbitals

2s orbitals are spherical regions around the nucleus of an atom where there is a high probability of finding an electron, belonging to the second energy level.