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प्रश्न
Complete the following flowchart.
उत्तर
| Exceptional properties of metals | |
| Properties | Exceptions |
|
1. Physical state: Metals exist mainly in a solid state at room temperature. 2. Hardness: Metals are generally hard. 3. Melting and boiling point: Metals have high melting and boiling points. |
1. Mercury and gallium exist in a liquid state at room temperature. 2. Lithium, sodium and potassium are metals which can be cut with a knife as they are very soft. 3. Sodium, potassium, mercury, and gallium have very low melting and boiling points. |
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संबंधित प्रश्न
The atomic number of an element X is 12.
(a) What must an atom of X do to attain the nearest inert gas electron configuration?
(b) Which inert gas is nearest to X?
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
For the reduction of metal oxide, suggest a reducing agent other than carbon.
Give reasons
Graphite is used in the leads of pencils
State the position of the following in the periodic table:
Alkaline earth metals
Why is hydrogen placed with alkali metals?
Write name.
The nonmetal having electrical conductivity.
Write scientific reason.
Generally the ionic compounds have high melting points.
What was Mendeleev's basis for the classification of elements?
State the position of the following in the periodic table:
Halogens
Name the following:
The most reactive halogen.
Can you store pickle in an aluminium utensil? Give reason.
The most abundant element in the universe is ____________.
The ability of metals to be drawn into thin wire is known as
Which one of the following metals do not react with cold as well as hot water?
Name two major non-metals which are present in fertilisers and enhance the growth of plants.
Which of the following metals can displace the other two metals from their salt solutions?
| Zinc | iron | copper |
Metals and non–metals are used for making ______, ______ and ______.
Silver and copper are very good conductors of electricity.
Why are metalloids called semimetals?
