Multiple Choice
How many valence electrons occupy sigma-bond orbitals in a single covalent bond between two atoms?
96
views
10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
How many electrons does a Mn atom have in its 3d subshell?
A
5
B
10
C
3
D
7
Verified step by step guidance1
Identify the atomic number of manganese (Mn), which tells you the total number of electrons in a neutral Mn atom. Manganese has an atomic number of 25.
Recall the electron configuration order and fill the orbitals up to manganese. The general order is 1s, 2s, 2p, 3s, 3p, 4s, then 3d.
Write the electron configuration for Mn: 1s\^2 2s\^2 2p\^6 3s\^2 3p\^6 4s\^2 3d\^5.
Focus on the 3d subshell, which is the last part of the configuration: 3d\^5 means there are 5 electrons in the 3d subshell.
Conclude that the number of electrons in the 3d subshell of a Mn atom is 5.
Related Videos
Related Practice
