MEDIUM
AS and A Level
IMPORTANT
Earn 100

Copy and complete the diagram below for the 15 electrons in phosphorus by:
Adding labels for the other sub-shell.
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Important Questions on Electrons in Atoms

MEDIUM
AS and A Level
IMPORTANT
Copy and complete the diagram below for the 15 electrons in phosphorus by:
Showing how the electrons are arranged.
Question Image
MEDIUM
AS and A Level
IMPORTANT
Predict a value for the first ionization energy for potassium, which has one more proton than argon.
MEDIUM
AS and A Level
IMPORTANT
Element X has the electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d8 4s2. State which block in the periodic table X belongs to.
EASY
AS and A Level
IMPORTANT
Element X having electronic configuration:1s22s22p63s23p63d84s2 forms an ion of type X2+.
Write the full electronic configuration for this ion using 1s2 notation.