Strontium has 2 valence electrons.
Methods
We can write the valence electrons of strontium using two different methods:
#1 Using periodic table
#2 Using electron configuration
Let’s break down each method in detail.
#1 Using Periodic Table
Get the periodic table having the chemical elements marked on it as mentioned above.
Now mark the location of strontium on the periodic table.
Next, mark the group number of strontium on the 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 strontium is in group 2, it has 2 valence electrons.
#2 Using Electron Configuration
- First, write electron configuration of strontium
The electron configuration of strontium is [Kr] 5s2.
Learn how to find: Strontium Electron Configuration
- Second, find highest energy level in electron configuration
In the above electron configuration, the highest energy level (5) is marked with green color.
- Finally, count electrons of that energy level
The 5th energy level contains 5s subshell and it has 2 electrons. So strontium has a total of 2 valence electrons.
Next: Cesium Valence Electrons
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Related:
Also Read:
- Strontium Element
- Strontium Bohr Model
- Strontium Electron Configuration
- Strontium Orbital Diagram
- Strontium Protons Neutrons and Electrons
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