La hipótesis de una investigación, se evalúa si es verdadera o falsa, en la etapa de: 1 Conclusión
2Observación
3Modelos y teorías
4Experimentación​

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

you gotta add the following molecules so we can give u an answer

explanation: