Define Aufbau's principle. Which of the following orbitals are possible.1s,1p,2s,3d,3f.
Answers
Answer:
The aufbau principle states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels
Among the given orbitals only 2s and 2p are possible. 1p and 3f cannot exist. For p-orbital, l = 1.
Answer:
The aufbau principle, from the German Aufbauprinzip, also called the aufbau rule, states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels. For example, the 1s subshell is filled before the 2s subshell is occupied.
2s and 2p orbitals are possible
Explanation:
Principle Quantum Numbers: It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....
Azimuthal Quantum Number: It describes the shape of the orbital. It is represented as 'I'. The value of I ranges from 0 to (n-1). For | = 0,1,2,3... the orbitals are s, p, d, f...
1. For 1 p:
n=1 and I can have value 0 to (n-1) i.e. O only. For p, I=1 which is not possible.
2. For 2s :
n=2 and I can have value 0 to (n-1) i.e. O and only. For s, 1=0 which is possible.
3. For 2p:
n=2 and I can have value 0 to (n-1) i.e. O and 1 only. For p, I=1 which is possible.
4. For 3f:
n=3 and I can have value 0 to (n-1) i.e. 0, 1 and 2 only For f 1-3 which is not possible