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Define the term: Element - Chemistry

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प्रश्न

Define the term: Element

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उत्तर

Element is a substance which cannot be split up into two or more simple substances by usual chemical methods of applying heat, light or electric energy; for example, hydrogen, oxygen and chlorine.

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अध्याय 4: Atomic Structure and Chemical Bonding - Exercise 4 (C) [पृष्ठ ६६]

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सेलिना Concise Chemistry [English] Class 9 ICSE
अध्याय 4 Atomic Structure and Chemical Bonding
Exercise 4 (C) | Q 9.5 | पृष्ठ ६६

संबंधित प्रश्न

Name a soft metal.


Give one example for the following types of mixtures :

misicible liquids


Give Two Examples for Each of the Following: Inert Gases


What are the advantages of chromatography?


Define a pure substance. How many types of pure substances do you know?


How is sodium chloride different from its constituent elements, sodium and chlorine in its properties? Justify.


State the number of atoms of each element, present in \[\ce{HNO3}\].

Also name the compound.


Name: A form of carbon used as a gem


Name: Two substances used to make jewellery.


Give reason: Argon is filled in electric bulbs.


Fill in the blank
The most abundant element in the earth’s crust is _______.


Fill in the blank
A metal which is a liquid at room temperature is _______.


Tick (√) the correct alternative from the choice given for the following statement

A non-metal which is a good conductor of electricity.


Complete the statement given below by filling in the blank with the correct word.

The basic unit of an element is an __________.


Write the names of elements from the following symbol:

Cd


Select the correct answer from A, B, C, D & E for the statement given below :

A mixture consisting of elements & a compound.


The diagram represents fractional distillation for the separation of mixtures. Answer the following :

  1. Can two immiscible liquids be separated by this process?
  2. Separation of liquids by this process is based on which physical property?
  3. If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
  4. Give a reason for the above answer.
  5. State the purpose of the fractionating column in the apparatus.

Differentiate metals and non-metals.


Match the following.

Atom Building block of matter
Element Atoms of different kinds
Compound Atoms of the same kind
Molecule Smallest unit of a substance

What is the Latin name of Sodium?


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