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प्रश्न
What do you understand by the term non-metal?
उत्तर
The elements which are either gases or soft solids, have no lustre, are non-malleable and non-ductile and bad conductors of heat and electricity are called non-metals.
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संबंधित प्रश्न
Give an example of a metal which is the best conductor of heat.
Fill in the blanks:
Metals are ________ conductors of heat and _________.
Name one metal and one non-metal which exist in liquid state at room temperature.
Write the name and formulae of a non-metal hydride.
You are given a dry cell, a torch bulb with holder, wires and crocodile clips. How would you use them to distinguish between samples of metals and non-metals?
Name a metal which is so soft that it can be cut with a knife.
State three reasons (of which at least one must be chemical) for believing that sodium is a metal.
Name a metal used as a thermometric liquid
Name a non-metal that a good conductor of heat and electricity
Write ‘true’ or ‘false’ for the following statement
Sodium can be cut with a knife.
What is an amalgam? How does an amalgam different from an alloy?
Name the three classes in which elements are classified. Which was the first metal used by man?
`Cl +e- → —`
`Mg -— → Mg^(2+)`
`Mg +H_2SO_4 → —+ — `
Explain how the activity series accounts for the following:
occurrence of metals
Identify the odd term.
Which metal occurs as a halide also gives the name of their respective ore.
How are metals like sodium, potassium, and calcium obtained? Give equations.
Select the appropriate option for the following statement:
The element placed in the extreme left of the Modern Periodic Table.
