science
Grade-9
Easy
Question
Which of the following elements have an unpaired electron in the orbitals
- Ne
- Be
- Ar
- F
Hint:
Fluorine is an atom that has one unpaired electron.
The correct answer is: F
- The atomic number of the fluorine atom is 9
- The electronic configuration of fluorine will be 1s2, 2s2, and 2p5.
- As the p subshell of the fluorine atom has 5 electrons, there will be 2 paired electrons and one unpaired electron.
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