Question

Explain how you can use the lewis dot structure to determine whether the element selenium would form a cation or anion. What is the most common selenium ion?

Answer 1

Answer:

Anion, $Se^{2-}$

Explanation:

Lewis structures are the diagrams which represent valence electrons of the atoms.

The Lewis symbols help to visualize valence electrons of the atoms and also the number of ions gained or lost by the atom to complete their octet and get stable.

The electronic configuration of selenium is : 2,8,18,6

The Lewis representation of the atom is:

$: \ddot Se :$

The valence electrons are 6 and it will gain 2 electrons to form corresponding anion.

Thus most common form of selenium ion is $Se^{2-}$