Atoms of the element selenium (atomic number 34) have the electron configuration
1s2, 2s2, 2p6, 3s2, 3p6, 4s2,3d10, 4p4
[Ar] 3d10 4s2 4p4
or
2, 8, 18, 6
Solutions are mixtures of one or more solutes dissolved in a solvent. They do not have electron configurations. Only atoms and ions have electron configurations.
The electron configuration of selenium for a 2- ion is [Kr]4s2.3d10.4p6.
Selenium has four electron shells.
It does.
Selenium has 6 electrons in its outermost shell.
Selenium has the greater electron affinity
Solutions are mixtures of one or more solutes dissolved in a solvent. They do not have electron configurations. Only atoms and ions have electron configurations.
All of the representative elements (s and p block) have predictable electron configurations. However, many of the transition elements have electron configurations that are not predicted by the rules for determining electron configuration.
The electron configuration of selenium for a 2- ion is [Kr]4s2.3d10.4p6.
The electron configuration of selenium is [Ar]3d10.4s2.4p4.
Selenium has 6 valence electrons
Selenium has four electron shells.
It does.
Selenium has 6 electrons in its outermost shell.
selenium
Group 18
any time there are as many electrons and protons and they fill each orbital optimally.