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IMPORTANT
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Presence of three unpaired electrons in phosphorus atom can be explained by

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Important Questions on Atomic Structure

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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 22
The maximum number of electrons in a subshell is given by the expression
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 23
Which of the following relates to photons both as wave motion and as a stream of particles?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 24
The number of nodes in 5d orbital is 
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 25
For which of the following species, Bohr theory is not applicable?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 26
If quantum number for last electron is n=3, l=0, m=0 then atomic number is
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 27
Which of the following transitions will have minimum wavelength?
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10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 28
Planck's constant has the units of  
EASY
10th CBSE
IMPORTANT
Foundation Course Chemistry>Chapter 7 - Atomic Structure>EXERCISE>Q 29
When the frequency of incident radiation on a metallic plate is doubled, KE of photoelectron will be