Oxygen has atomic number 8. How many times must an oxygen atom be ionized to create an O+5 ion, and how many electrons will the ion have?
A) It must be ionized three times; it now has five electrons.
B) It must be ionized five times; it now has five electrons.
C) It must be ionized five times; it now has three electrons.
D) It doesn't have to be ionized; it just needs to gain five protons.
E) It doesn't have to be ionized; it already has only three electrons.
Question 2
The Archaea Sulfolobus live in volcanic hot springs where they obtain energy from chemical reactions and carbon from their environment. Given this, they can be classified metabolically as
A) photoheterotrophs
B) chemoautotrophs
C) photoautotrophs
D) chemoheterotrophs
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