Which among the following elements will have maximum energy for 2s orbital?NaLiKH
Question
Which among the following elements will have maximum energy for 2s orbital?
- Na
- Li
- K
- H
Solution
The energy of an orbital (like 2s) in an atom is determined by the effective nuclear charge, which is the net positive charge experienced by an electron in a multi-electron atom. The effective nuclear charge increases with the atomic number.
Here are the atomic numbers for the given elements:
- Sodium (Na): 11
- Lithium (Li): 3
- Potassium (K): 19
- Hydrogen (H): 1
Among these elements, Potassium (K) has the highest atomic number. Therefore, the 2s orbital of Potassium (K) will have the maximum energy.
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