The Transition Metal Found in the Core of Vitamin B₁₂

question 19

Multiple Choice

The transition metal found in the core of Vitamin B₁₂ is ____ and in its stable commercial form has a ____ oxidation state.

• A)Co,+3
• B)Cr,+3
• C)Cr,+2
• D)Co,+2
• E)Co,+1

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Definitions:

Fear of Dogs

Also known as cynophobia, it is an intense and persistent fear of dogs, often resulting from a negative experience or conditioning.

Blood-injection-injury Phobias

An intense irrational fear of blood, injections, or injuries that can result in physical reactions such as fainting.

Applied Tension Technique

Technique used to treat blood-injection-injury type phobias in which the therapist teaches the client to increase his or her blood pressure and heart rate, thus preventing the client from fainting.

Systematic Sensitization

Systematic Sensitization, perhaps meant to be Systematic Desensitization, is a behavior therapy technique used to reduce anxiety or fear through gradual exposure to the feared object or situation in combination with relaxation exercises.