Barium valence electrons

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Barium valence electrons
Barium valence electrons

Barium has 2 valence electrons.

Methods

We can write the valence electrons of barium using two different methods:

#1 Using periodic table
#2 Using electron configuration

Let’s break down each method in detail.

Using periodic table

Periodic table

Get the periodic table having the chemical elements marked on it as mentioned above.

Now mark the location of barium on the periodic table.

Barium location marked on periodic table

Next, mark the group number of barium on the periodic table.

Barium group number marked on periodic table

The valence electrons of each main-group element can be determined by the column in which it is located.

(i.e., all group 1 elements have 1 valence electron, all group 2 elements have 2 valence electrons, skip the transition metals… then, all group 13 elements have 3 valence electrons, all group 14 elements have 4 valence electrons, and so on up to group 18 elements)

Since barium is in group 2, it has 2 valence electrons.

Using electron configuration

  • First, write electron configuration of barium

The electron configuration of barium is [Xe] 6s2.

  • Second, find highest energy level in electron configuration
Green colored number represent highest energy level

In the above electron configuration, the highest energy level (6) is marked with green color.

  • Finally, count electrons of that energy level
Number circled with green color represent electrons

The 6th energy level contains 6s subshell and it has 2 electrons. So barium has a total of 2 valence electrons.

Next: Francium valence electrons

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Deep

Learnool.com was founded by Deep Rana, who is a mechanical engineer by profession and a blogger by passion. He has a good conceptual knowledge on different educational topics and he provides the same on this website. He loves to learn something new everyday and believes that the best utilization of free time is developing a new skill.

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