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प्रश्न
Define Elements.
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उत्तर
Elements: An element is defined as a pure substance made up of only one kind of atoms that cannot be converted into anything simpler than itself by any physical or chemical process.
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संबंधित प्रश्न
Correct the following statement:
CO and Co both represents cobalt.
Give two examples of Metalloids.
Give two examples of the following.
Non-metals which are solids
Give two examples of the following.
Metals which are soft
Find the atomicity of the Following molecule:
Aluminium Suiphide
Tick (√) the correct alternative from the choice given for the following statement
A non-metal which is a good conductor of electricity.
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name - a poisonous gas almost as heavy as air.
Write the names of elements from the following symbol:
Xe
Select the correct answer to the statement given below:
The chemical name for dinitrogen oxide [N20].
Higher Order Thinking Skills.
In the diagram given below, the circle, square and triangle represent the atoms of different elements.
Identify all combinations that represent
- molecule of a compound
- molecule of an element consisting of two atoms
- molecule of an element consisting of three atoms
