polarity

[Dakota_Campbell_1C]

Is it safe to assume that any covalently bonded molecule with a lone pair on the central atom will be polar? How can polarity be determined with larger molecules in class Lavelle usually draws arrows to demonstrate what direction the positive and negative poles are at how is this determined.

[Henry Krasner 1C]

Molecules that are completely symmetrical are nonpolar, whereas molecules that are uneven (as in when drawn out in a Lewis Structure) are polar.

[Carlos De La Torre 2L]

yes going off of the previous post, molecules that are symmetric are non-polar, for example, a square planar molecule is non-polar despite having two lone pairs due to it being symmetric, usually larger molecules with different elements that isn't symmetrical are non-polar. To help determine if it is polar or not find the central atom and see if the dipoles are the same on both sides .

[Xingzheng Sun 2K]

Molecules with one pair of electrons are polar, but as for two pairs or more, it depends on the shape and if the elements are the same. The graph on the textbook of VSEPR type VS polarity would help.

[Ivan Tadeja 1G]

With that logic, it would make sense that due to the presence of a lone pair then the shape would not be symmetrical, therefore electrons would not be evenly shared. However I would say drawing out the structure just to demonstrate and prove its polarity. I'm not sure that your reasoning would suffice during a test.

[Dana Wilks 3I]

To help determine if it is polar or not find the central atom and see if the dipoles are the same on both sides .

Going off of this, to determine if the dipoles are the same or not, you can look at the electronegativity of the (different) atoms surrounding the central atom.

[Megan Gianna Uy 3L]

A molecule that is a dipole (meaning positively charged on one side and negatively charged on the other) is polar. A molecule that is nonpolar is, as previously stated, symmetrical.

[Yiting_Gong_4L]

It is better to check the symmetry of the lewis structure.

[amogha_koka3I]

So just to confirm, does polarity have anything to do with if there are single, double, or triple bonds?

[Ricardo Martin 1J]

If a Lewis structure is symmetric it is non-polar and if it is not symmetric it is polar.

[Jchellis 1I]

To check the symmetry of a Lewis Structure you can draw a line down the middle for a simple test

[305115396]

So just to confirm, does polarity have anything to do with if there are single, double, or triple bonds?

Just as VSEPR structures daren't drawn according to whether they have single, double, or triple bonds, polarity is also not determined in this way. Polarity doesn't have to do with single, double, or triple bonds.