An atom has an electron configuration of 1s²2s²2p 3s²3p³. How many valence electrons does the atom have? A 3 B 5 C 10 D 15

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Q: What are used to represent valence electrons in a A arrows B dots C lines D numbers

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.