Question: How many atoms of a chlorine element would be needed to react with one atom of helium?
Answer: So... for the element of CHLORINE, you already know that the atomic number tells you the number of electrons. That means there are 17 electrons in a chlorine atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and seven in shell three.
Hope this helps!.
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~A.W~ZoomZoom44
