The 3 indicates the third electron shell. (Which has only 1 electron in it in this configuration)
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Answer:
As electro-negativity decreases from Florine to downwards in the group and only Florine is above Chlorine, so Florine should react with sodium chloride solution to produce chlorine.
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Answer:
B. Molecules of Elements
Explanation:
An Element is formed of like one type of atoms, and an element is a pure substance.
Fluorine! It's highly reactive, since it has 7 electrons and wants an extra electron to fill its valence shell.
