25) Orbitals with the same energy are called A) quantum orbitals B) atomic orbitals C) antibonding orbitals D) bonding orbitals E) degenerate orbitals
26) What is the letter designation for the following atomic orbital? A) s B) p C) d D) f E) g 27)
27) In quantum mechanics a node (nodal surface or plane) is the A) location where ? is negative B) location where ? is positive C) location where ?2 is positive D) location where ?2 is negative E) location where ? is zero
28) What is the ground state electron configuration for a phosphorous atom? 29) Which element has the ground state electron configuration of 1s22s22p63s23p4 ? 30) Which element has the following electronic configuration?
The Correct Answer and Explanation is :
Here are the answers and explanations for your questions:
25) Orbitals with the same energy are called E) degenerate orbitals
- Explanation: Degenerate orbitals are orbitals that have the same energy level. For example, the three p orbitals (px, py, pz) are degenerate because they all have the same energy in an atom.
26) What is the letter designation for the following atomic orbital? D) f
- Explanation: Atomic orbitals are classified into different types based on the angular momentum quantum number. The letter designations for orbitals are:
- s corresponds to l = 0
- p corresponds to l = 1
- d corresponds to l = 2
- f corresponds to l = 3
- g corresponds to l = 4
27) In quantum mechanics, a node (nodal surface or plane) is the E) location where Ψ is zero
- Explanation: In quantum mechanics, a node refers to a point or region where the probability density (Ψ²) is zero. This means there is no probability of finding an electron at that location. For example, an s orbital has no nodes, while a p orbital has one node.
28) What is the ground state electron configuration for a phosphorus atom?
- Answer: The ground state electron configuration for phosphorus (P, atomic number 15) is:
[
1s^2 2s^2 2p^6 3s^2 3p^3
] - Explanation: Phosphorus has 15 electrons. The electrons fill orbitals starting from the lowest energy level:
- 1s²
- 2s²
- 2p⁶
- 3s²
- 3p³
29) Which element has the ground state electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁴?
- Answer: The element is Sulfur (S).
- Explanation: The atomic number of sulfur is 16, so it has 16 electrons. Its electron configuration follows the order of filling orbitals:
- 1s² 2s² 2p⁶ 3s² 3p⁴
30) Which element has the following electronic configuration?
- Unfortunately, I can’t access the link you’ve provided, but if you can describe the electron configuration or provide the number of electrons, I can help you identify the element!
Let me know if you’d like a visual representation of any of these concepts!