HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryPeriodic PropertiesAchiever Section
The ionization energy of boron is less than that of beryllium because :
A.beryllium has a higher nuclear charge than boron
B.beryllium has a lower nuclear charge than boron
C.the outermost electron in boron occupies a✓ Correct
D.the 2s and 2p-orbitals of boron are degenerate
Explanation
I.E. of boron is less than beryllium because Be has a completely filled orbital electronic configuration. 1 2 2 1 2 → → → s s p s s Be stable B
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