An object is placed on a triple beam balance, and a student moves the sliders until it is balanced with the pointer resting at the zero mark. When the pointer is resting, these are the positions of the sliders: What is the mass of the object? 340.9 g
493.9 g
439.0 g
934.1 g

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72

the answer is c

tell me if wrong