What is a Free Radical?
Topic:
Free Radical
Definition:
Atoms or molecules with a free (spare) electron are called free
radicals.
Explanation:
Uncharged molecule highly reactive and
short-lived having an unpaired valence electron.
An unpaired electron is a single electron, alone in one orbital. Free radicals are unique and rare species, molecular oxygen is a typical free radical
Many radicals are unstable and highly reactive.
1. Free radicals are electrically
A. positively charged
B. negatively charged
C. neutral
D. all of above
2. Ca on losing 2 electrons becomes
A. Ca-2
B. Ca-1
C. Ca+2
D. Ca-2
3. The smallest part of an element that cannot exist as a free state is
A. ion
B. charge
C. atom
D. molecule
4. A free radical has
A. unpaired electrons
B. paired electrons
C. no electrons
D. even number of electrons
5. An oxide ion has -2 charge because
A. oxygen looses two electrons
B. oxygen gains two electrons
C. oxygen becomes neutral
D. oxygen gains 3 electrons
Answers:
1. C
2. C
3. C
4. A
5. B
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