How is calcium, lithium and potassium related to sodium? (brief description please?)I'm doing this baby book thing in science where we have to choose a element and make a scrapbook about it and I...

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How is calcium, lithium and potassium related to sodium? (brief description please?)

I'm doing this baby book thing in science where we have to choose a element and make a scrapbook about it and I need something like family members os sodium and a brief description about it and I'm unsure what to put... help me? Thanks!

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Lithium, Sodium and Potassium are all in group 1 of the periodic table (pt) which is the alkaline metal group.  They each have 1 outer shell electron and are very reactive.  Reactivity increases as you down the group.  Calcium is reactive but not as reactive as it is in Group 2 of the pt the alkaline metal group.

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