Advertisements
Advertisements
प्रश्न
An element has its electron configuration as 2,8,8,2. Now answer the following questions.
a) What is the atomic number of this element?
b) What is the group of this element?
c) To which period does this element belong?
Advertisements
उत्तर
a) The atomic number of this element is 20.
b) The group of this element 2.
c) This element belongs to fourth period.
APPEARS IN
संबंधित प्रश्न
Give a reasons for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Name the method by which aluminium metal is extracted.
Which of the following pair of metals exists in their native state in nature?
An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolysed then a compound D is formed and two gases are liberated.
- What are A and B?
- Identify C and D.
- What will be the action of C on litmus solution? Why?
- State whether element B is a solid, liquid or gas at room temperature.
- Write formula of the compound formed when element B reacts with an element E having atomic number 5.
Which metal can be extracted from the following ore?
Haematite
State three objectives achieved during the roasting of ores.
Give the principles of the hydrolytic method.
Aluminum is used in thermite welding:
what is thermit?
Aluminum is used in thermite welding:
what is ignition mixture?
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
Give the chemical formula of :
Bauxite
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Usually ______ ores are subjected to ______ which is done in the absence of air.
Zinc blende is converted to oxide by ______ process.
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Identify the substance oxidised and reduced in the above reaction.
