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Old 08-07-2012, 08:45 AM
 
13,138 posts, read 37,324,951 times
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Maybe someone who knows chemistry can answer this for me and that is why is it that Hydrogen a gas is listed in Column One of the Periodic Table along witth the Alkali Metals Lithium, Sodium, Potassium, Rubidium, Caesium and Francium (they also end in ium as hydrogen does not). Looking at the Periodic Table most of the elements in each column are similar e.g. Metaloids, Halogens, Noble Gases etc. and yet again Hydrogen is a gas and not an Alkali Metal. The only reason i can guess is that it has one valence electron in its outer most shell as does all the other column one elements and so maybe that's why it's placement there?

Can someone help me out here?
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Old 08-07-2012, 07:03 PM
 
Location: Westwood, MA
3,838 posts, read 4,950,794 times
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Originally Posted by 6 Foot 3 View Post
Maybe someone who knows chemistry can answer this for me and that is why is it that Hydrogen a gas is listed in Column One of the Periodic Table along witth the Alkali Metals Lithium, Sodium, Potassium, Rubidium, Caesium and Francium (they also end in ium as hydrogen does not). Looking at the Periodic Table most of the elements in each column are similar e.g. Metaloids, Halogens, Noble Gases etc. and yet again Hydrogen is a gas and not an Alkali Metal. The only reason i can guess is that it has one valence electron in its outer most shell as does all the other column one elements and so maybe that's why it's placement there?

Can someone help me out here?
You've nailed it. Columns are based on the number of valance electrons. Hydrogen and all the others have only 1. Hydrogen is quite different than all the other group 1 elements, though, since it is only missing one valance electron, so it does thing like atoms in group 17, such as form covalent bonds.
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Old 08-08-2012, 05:27 AM
 
13,138 posts, read 37,324,951 times
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Originally Posted by jayrandom View Post
You've nailed it. Columns are based on the number of valance electrons. Hydrogen and all the others have only 1. Hydrogen is quite different than all the other group 1 elements, though, since it is only missing one valance electron, so it does thing like atoms in group 17, such as form covalent bonds.
I kind of figured that although i wasn't 100% sure since hydrogen is vastly different than the alkali metals in that column.

Thanks a bunch Jayrandom
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