Chapter 2:Unit 9. Electron Dot Symbol

Electron dot symbol

We know that valence electrons of elements can be determined from the periodic table. The table below indicates valence electrons of each group element.

An electron-dot symbol uses a dot to represent each valence electron around the symbol for an element. Each dot represents on electron. The dots are placed on the four sides of an element symbol. For one to four valence electrons, single dots are used.  With more than four electrons, the dots are paired.

Recall, it is the valence electrons that are involved in most chemical reactions. Therefore, these Lewis electron-dot symbols should help us understand the chemical properties of these elements.

Watch this out!

Questions:

1. locate the valence electrons of Aluminum

2. Locate the valence electrons and name it.

3. How many unpaired valence elctrons are present in Nitrogen?

Ans: 1. 3 valence electrons
2. 4 valence electrons and atomic number is 6. The element is carbon.
3. three unpaired.