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प्रश्न
What is an amalgam?
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उत्तर
Amalgam is an alloy of mercury with one or more metals. Sodium along with liquid mercury is known as sodium amalgam. Amalgam of mercury with tin, silver and zinc is widely used in dental filling.
संबंधित प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
What is an alloy?
State the position of the following in the periodic table:
Aluminium
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Sulphuric acid
Write name.
The nonmetal having electrical conductivity.
What was Mendeleev's basis for the classification of elements?
State the position of the following in the periodic table:
Halogens
Give reasons for the following.
- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
Metals and non–metals are used for making ______, ______ and ______.
