3. (08.01 LC) What is a result of the unequal electron sharing in a water molecule? (5 points)
Water molecules have a nonpolar bond.
Water molecules have a weakly positive oxygen end.
Water molecules have a weakly positive hydrogen end.
Water molecules have two oxygen and two hydrogen atoms.

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answer carbon and three oxygen atoms;

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.