SSC MTS EXAM

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SSC

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In a molecule of fluorine, the two shared electrons give each fluorine atom ____ electron(s) in the outer energy level.
A
1
B
3
C
8
D
32
Explanation: 

Detailed explanation-1: -Two fluorine atoms bond together to form the fluorine molecule because both those atoms can obtain a full octet by the sharing of two electrons. Since fluorine is in group 17 of the periodic table, which means it has 7 valence electrons, it only needs one more to complete its octet-8 electrons in its valence shell.

Detailed explanation-2: -Fluorine is the ninth element with a total of 9 electrons. In writing the electron configuration for fluorine the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for F go in the 2s orbital.

Detailed explanation-3: -The diatomic fluorine molecule (F2) contains a single shared pair of electrons. Each F atom also has three pair of electrons that are not shared with the other atom.

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