Page 101 - Chemistry eBook
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Group 17 (Halogen Family)
1. Halogens are the most active nonmetals.
They have 7 valence electrons and need only one more, so they’re always trying to steal the last one so that they can have 8 valence electrons (the max).
2. Halogens form -1 ions because they take in one electron to complete the valence shell.
3. Highest electronegativity (most attraction)
4. Very high ionization energy (won’t give up an electron easily)
5. Halogens are only found bonded because they are so active and never
want to be incomplete. They are usually found in nature as DIATOMIC ATOMS: Atoms that bond with themselves. (This will be explained later on.)
F2
6. From top to bottom, the activity of the halogens decreases. ‘F’ (top element) is the most reactive of the halogens.
UNIT 3: PERIODIC TABLE OF ELEMENTS © 101
