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.
Determine each atom's electronegativity from the table. You can determine a non polar molecule immediately if the molecules have equal electronegativity. A molecule can also be non polar if the structure of the atoms line up in a way that the outer orbital electrons cancel out electronegativity.