Â© Ted French. Definition: A function is a preset formula in Excel and Google Spreadsheets. Like formulas, functions begin with the equal sign (=) followed by the function's name and its arguments. The function name tells Excel what calculation to perform. The arguments are contained inside round brackets.
Best Answer: Look for molecular symmetries. Symmetrical molecules such as methane, carbon dioxide, carbon disulfide, and borane (BH3) are nonpolar. Asymmetric molecules such as water, ammonia, and acetone are polar.
A molecule that contains polar bonds may or may not be polar, depending on its shape. Molecules that do not contain polar bonds are not polar unless the central atom has one or more nonbonded pairs of electrons. The general principle is that if a molecule is symmetric, its electrons will be uniformly distributed and it will be nonpolar. Itâs the same idea you used to determine whether a bond was polar.