CAN SOMEONE PLEASE HELP Wash out the cup and fill it half full of room temperature water. Use a knife to cut the other tablet into tiny pieces, or firmly tap the tablet with the back of a metal spoon to break it up. Add the pieces of the broken tablet to the cup of water. Using a stopwatch, time how long it takes for the tablet to dissolve completely. Record your observation.

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!

if you need further assistance, let me know: )

~ trueboss72

answermeridional ;