How is vsepr used to classify molecules? What are the units used for the ideal gas law? How does Charle's law relate to breathing? What is the ideal gas law constant? How do you calculate the ideal gas law constant? How do you find density in the ideal gas law? Does ideal gas law apply to liquids? But before proceeding with the Lewis Dot Structure, we will first look at the total number of valence electrons for this molecule as these are the ones that participate in the bond formation.
The electrons that participate in the bond formation and are in the outermost shell of the atom are referred to as valence electrons. Each Hydrogen atom has one valence electron, so there are a total of four valence electrons for all Hydrogen atoms. Lewis structure is also referred to as electron dot structure.
Dots are represented to show the electrons, and lines are used to indicate the bonds between the atoms. Lewis structures are based on the octet rule, which says an atom must have eight valence electrons in its outer shell to attain a structure similar to the closest noble gas. However, many elements are exceptions to this rule. Let us look at the Lewis Structure of CH 4 and determine how the atoms are arranged in the molecule. Carbon in Methane takes the central position as it is less electronegative than the Hydrogen atoms.
Arrange all the Hydrogen atoms around the Carbon atom. Now each Hydrogen just needs one more valence electron to attain a stable structure. So for doing that, it will share one valence electron of the Carbon atom. As Carbon has four valence electrons, it will share all four electrons with the Hydrogen atoms. Each bond requires two valence electrons, and hence eight valence electrons are used up by forming bonds.
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