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प्रश्न
Select the correct answer to the statement given below:
A metalloid
विकल्प
Chalk
Oxygen
Silicon
Bromine
Nitrous oxide
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उत्तर
Silicon
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संबंधित प्रश्न
Define: Elements
Name: an Inert Gas
Define Elements.
Name: A form of carbon used as a gem
Name A substance used as an insulator.
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Indicate whether the following statement is true or false:
Molecules combine to form atoms
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Write the names of elements from the following symbol:
Fe
Select the correct answer to the statement given below:
A non-metal which exists in the liquid state.
Give an example of two liquids that form heterogeneous mixtures.
Select the correct answer from the choice given below to complete the sentence :
Dust in air is an example of _________ mixture.
State true of false. If false, give the correct statement.
Two different elements may have similar atoms.
Match the following:
| 1. | Co2 | a. | Robert Boyle |
| 2. | Sulfur | b. | Making mobile phones |
| 3. | Element | c. | triatomic molecule |
| 4. | Gallium | d. | Polyatomic molecule |
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
Higher-Order Thinking questions:
Why is hydrogen considered an element?
Name the two elements which are derived from the country.
