Determine the total number of electrons, the number of valence electrons, and the name of the element with each electronic configuration. [Kr] 5s2, 4d10, 5p3
The electron configuration [Kr] 5s2, 4d10, 5p3 represents the element iodine (I).
To determine the total number of electrons, we add up the numbers of electrons in each sublevel:
5s2: 2 electrons
4d10: 10 electrons
5p3: 3 electrons
Adding these together, we get:
2 + 10 + 3 = 15 electrons in total.
To determine the number of valence electrons, we look at the outermost energy level, which is the 5th energy level in this case. The 5s and 5p orbitals are in the outermost energy level. Counting the electrons in the 5s and 5p orbitals, we get:
5s2: 2 electrons
5p3: 3 electrons
Adding these together, we get:
2 + 3 = 5 valence electrons.