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Question: 6. A) Organic Chemistry Some metals that are common in our biosystem, e.g., Fe in Blood, Co in Vitamin B12, Cu in Shrimp. Why? 6. B) General Chemistry Give example where will you see the fission and fusion reactions. How will you calculate the molecular weight of a compound? In which compounds, you will find ionic and covalent bond. 6. C) What is oxidation number? How to determine the oxidation number of an atom in molecule
6. A) Organic Chemistry
Some metals that are common in our biosystem, e.g., Fe in Blood, Co in Vitamin B12, Cu in Shrimp. Why?
6. B) General Chemistry
Give example where will you see the fission and fusion reactions.
How will you calculate the molecular weight of a compound? In which compounds, you will find ionic and covalent bond.
6. C) What is oxidation number? How to determine the oxidation number of an atom in molecule
Explanation / Answer
6.A) 13 metals are essential for plants and animals . Na , K, Ca, Mg are presnt in large quantities and are known as bulk metals. the remaining 9 are present in small quantities. they are d block elements ; V,Cr,Mo,Mn,Fe,Co,Ni,Cu,Zn knows as trace metals.
general role of trace metals is one of catalysis, often through redoxing and this occurs in the active site of enzymes. in metalloenzymes the metal ion may be a permenant component of the active site ( Fe2+ in
hemoglobin) or may be a part of a coenzyme(Co2+ in vitamin B12 coenzyme )
and some metals are act in electron transfer systems through changing their oxidation states ( Cu,Zn, Fe)
B) fusion- occurs in stars - sun
fission- not occur naturally. -- atomoic bombs.
molecular weight - determine the atomic mass (atomic weight) of each element. Multiply each atomic mass by the number of atoms in the formula. then add them together.
Some compounds contain both ionic and covalent bonds. These compounds contain polyatomic ions. Many of these compounds contain a metal, a nonmetal and also hydrogen. However, other examples contain a metal joined via an ionic bond to covalently bonded nonmetals. - NaNO3,(NH4)S, CaCO3
c)a number assigned to an element in chemical combination which represents the number of electrons lost (or gained, if the number is negative), by an atom of that element in the compound.
rules for calcule ox number.
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