1. Iron deficiency anemia Partner Obligations: the obligation to make the metal, metal,
2. Use the electron:There was an element of metal to try to make yourself available for eight electron due to iron deficiency anemia, metal or other similar obligation as a single obligation, a partner and no obligation three
3. EN: different. At least until I
4 is no different. The strength of obligation:No Obligation less than sturdy metal and cement the ion electronic
5. The characteristics of compounds: there are both 3 status is not used electric boiling point melting point low
6. For example, obligation of เลนต์: CI 2
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