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Group 19 elements have 8 valence electrons (obey octet rule) and are hence stable.

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What are the different elements in group 18?

Helium, Neon, Argon, Krypton, Xenon, Radon


How many elements make up group 7 group 14 and group 18?

There is a total of 17 elements in those groups.


What elements are in group 17?

Group 17 elements are called the halogens. Group 18 elements are called the noble gases.


What are the elements in group 17?

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The difference between group 1 and group 2 metals is that group 1 metals have ONE valence electron and group 2 have TWO valence electrons. This makes a great difference in how they react chemically with other elements and compounds.


Oxidation number for first 20 elements?

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