Write the names and symbols of two most reactive metals belonging to group 1 of the periodic table. Explain by drawing electronic structure how either one of the two metals reacts with a halogen. With which name is the bond formed between these elements known and what is the class of the compound so formed known? State any four physical properties of such compounds.
OR
What is meant by refining of metals? Name the most widely used method of refining impure metals produced by various reduction processes. Describe with the help of a labelled diagram how this method may be used for refining of copper.
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The two of the most reactive elements of group 1 are sodium and potassium (Na and K) respectively.
Refer diagram.
The bond formed is ionic bond.
The class is non polar ionic compounds.
PROPERTIES.
1. They are good conductors of electricity in aqueous form or molten form.
2. They have Crystalline structure
3. They are not brittle(not easily breakable)
4. They have low tensile strength.
Refer diagram.
The bond formed is ionic bond.
The class is non polar ionic compounds.
PROPERTIES.
1. They are good conductors of electricity in aqueous form or molten form.
2. They have Crystalline structure
3. They are not brittle(not easily breakable)
4. They have low tensile strength.
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Answer:
The two most reactive metals are:
Metal (symbol): Electronic configuration
- Cesium ( Cs ) : 2,8,18,18,8,1
- Francium (Fr) : 2,8,18,32,18.8, I
Bond formed by these compound is always ionic compounds.
4 physical properties of these compounds are:
- Bonds are strong.
- Non-brittle.
- Generaly soluble in water.
- Conduct electricity.
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