Hydrogen covalently bonds with oxygen to form the compound water. oxygen becomes more chemically stable because a- hydrogen transfer an electron from oxygen to fill its outer energy level b- it partially fills its outer energy level with shared electrons from hydrogen c- it particularly fills its outer energy level with transferred electrons from hydrogen d- hydrogen acquires transferred electrons from oxygen leaving oxygen with 6 outer electrons

B- it partially fills its outer energy level with shared electrons from hydrogen

Explanation:

The water molecule is formed by two covalent bonds O - H, being H - O - H its structural formula. The oxygen atom has six electrons in the valence shell, so two more electrons are required for it to achieve electronic stability. The hydrogen atom has only one electron, and one more electron is required for its stability (K layer = two electrons). Therefore, in the water molecule there is a pair of electrons between each hydrogen atom and the oxygen atom. Accordingly, we can conclude that in the water molecule oxygen becomes more chemically stable because it partially fills its external energy level with hydrogen shared electrons.

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chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

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