Molecules with Lone Pairs

(Polar molecules, Non-polar molecules, etc.)

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Molecules with Lone Pairs

Postby harperlacroix1a » Mon Nov 12, 2018 8:50 pm

For problem 4.1 in the 6th edition, it asks whether there can be lone pairs on the central atom of the ball and stick models of the atom. part (a) models three atoms with an angle of 120 degrees and the second is a linear model with an angle of 180 degrees. how does the degree decide how many lone pairs the electron can have?

Elisa Bass 4L
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Joined: Fri Sep 28, 2018 12:23 am

Re: Molecules with Lone Pairs

Postby Elisa Bass 4L » Mon Nov 12, 2018 9:30 pm

Due to electron repulsion, the presence of lone pairs alters the shape of the model. They push the atoms away from them, which causes the angles between the atoms to be different. You can tell whether or not the central atom has any lone pairs from the resulting angle between the atoms, so it’s more that the lone pairs determine the degree. This problem just addresses it differently, taking the resulting angle to determine the possibility of lone pairs.

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