The substances on the Periodic Table are examples of what type of matter? A Elements
B Compounds
C Mixtures
D Chemicals
Please answer as fast as you can

A Elements

Explanation:

The substances on the periodic table are examples of elements.

An element is a distinct substance that cannot be split-up into simpler substances. Such substances consists of only one kind of atom.

There are over one hundred elements that are known to date.

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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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