Mary used iodine to test a substance for starch. The color of the iodine placed on the substance was orange. What was the result of Mary’s test?

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

the answer is minerals.

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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