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Biological Importance of Group 1a-2a

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1. IA (Alkaline Metals) 1.1. H………………………………………………………………………..2 1.2. Li………………………………………………………………………..2 1.3. Na………………………………………………………………………2 1.4. K………………………………………………………………………..3 1.5. Rb………………………………………………………………………3 1.6. Cs………………………………………………………………………3 1.7. Fr……………………………………………………………………….4 1. IIA (Alkaline Earth Metals) 2.8. Be………………………………………………………………………4 2.9. Mg………………………………………………………………………4 2.10. Ca………………………………………………………………………4 2.11. Sr……………………………………………………………………….4 2.12. Ba………………………………………………………………………5 2.13. Ra………………………………………………………………………5

1. Group IA 2.1. H
Hydrogen binds with Oxygen to form water. Without water, we can not survive. In fact, we are mostly made of water.

2.2. Li
Lithium does not occur naturally in biological systems and has no biological role, but does have effects on the body when ingested. Lithium carbonate is used as a mood stabilizer in psychiatry to treat bipolar disorder (manic-depression) in daily doses of about 0.5 to 2 grams, although there are side-effects. Excessive ingestion of lithium causes drowsiness, slurred speech and vomiting, among other symptoms, and poisons the central nervous system, which is dangerous as the required dosage of lithium to treat bipolar disorder is only slightly lower than the toxic dosage.
The metal lithium is not essential for any biological functions, but was found to exist in extremely tiny quantities in umbilical cord blood. While it is considered a non-essential trace element (an element needed in extremely tiny amounts for proper growth), lithium also has medicinal uses. A double-blind, placebo-controlled, two-week long study conducted by a group of doctors on severely depressed patients proved that lithium is a key component in the treatment of severe depression. It has also

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