Assign a correct set of four quantum numbers for
- (a) Each electron in a nitrogen atom.
- (b) The valence electron in a sodium atom.
- (c) A 3d electron in a nickel atom.
(a)
Interpretation:
A correct set of four quantum numbers for each electron in nitrogen atom has to be given.
Concept Introduction:
Principal Quantum Number (n): In an atom, the electron energy mainly depends on principal quantum number. The energy of an electron becomes lower when the value of n is smaller. The orbital size also depends on n. The size of orbital increases with increase in value of principal quantum number (n)
Angular Momentum Quantum Number (l): It helps to differentiate different shapes of orbitals for given n. For a given n, there are n different shapes of orbitals are present and are denoted as l. Angular momentum quantum number is also known as Azimuthal quantum number. The possible values of angular momentum quantum number are between
Magnetic Quantum Number (
Spin Quantum Number (
Explanation of Solution
The electronic configuration of nitrogen atom is given by
The arrangement of electrons in nitrogen atom is
First electron in 1s orbital:
Second electron in 2s orbital:
First electron in 2s orbital:
Second electron in 2s orbital:
First electron in 2p orbital:
Second electron in 2p orbital:
Third electron in 2p orbital:
(b)
Interpretation:
A correct set of four quantum numbers for valence
Concept Introduction:
Refer to part (a)
Explanation of Solution
The electronic configuration of sodium atom is given by
The arrangement of valence
First electron in
(c)
Interpretation:
A correct set of four quantum numbers for a
Concept Introduction:
Refer to part (a)
Explanation of Solution
The electronic configuration of nickel atom is given by
The arrangement of a
First electron in
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EBK CHEMISTRY: THE MOLECULAR SCIENCE
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