When aluminum is combined with oxygen, aluminum oxide is formed. the rearrangement of the atoms involved is an example of what? a. physical change b. chemical change c. chemical property d. intensive physical property

that tool would be a compass

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.

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