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Solution: Which of the following has two unpaired electrons?a. Mgb. Sic. Sd. Both Mg and Se. Both Si and S

Problem

Which of the following has two unpaired electrons?

a. Mg

b. Si

c. S

d. Both Mg and S

e. Both Si and S

Solution

We are being asked to determine the element with two unpaired electrons.

For this, we need to do the following steps:

Step 1: Write the electron configuration of the element.

Step 2: Show the filling up of orbitals and determine the number of unpaired electrons.


a. Mg

Step 1: Write the electron configuration of the element.

Neutral magnesium (Mg):

 Atomic number = 12
 # of electrons = 12 e-

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