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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Differentiate between an atom and a molecule.

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प्रश्न

Differentiate between an atom and a molecule.

अंतर स्पष्ट करें
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उत्तर

  Atom    Molecule
1. Atoms are described as the smallest particles of an element that do not exist freely in nature but participate directly in chemical reactions. 1. A molecule consists of bound atoms that exist freely in nature but do not directly participate in chemical combinations.
2. The symbol of an element represents its atom. For example, the symbol H represents a hydrogen atom. 2. The molecular formula represents any substance's molecule. For example, the oxygen molecule is represented as O2.
3. An atom is made up of subatomic particles i.e., electrons, protons, and neutrons. 3. Molecules are made up of two or more atoms, which either be from the same or different elements.
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अध्याय 1: Matter and Its Composition - Exercise

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एस पी सिंग Concise Chemistry [English] Class 7 ICSE
अध्याय 1 Matter and Its Composition
Exercise | Q 6

संबंधित प्रश्न

Solids have definite shape and definite volume. 


Name the terms for the change of a solid into liquid.


Which one is a kind of matter:


What is the scientific name of particles which make up mater?


What are the three general classes of matter ? Give one example of each type.


What is the name of the clear liquid formed when a solid dissolves in a liquid ?


Explain what happens when a beam of light is passed through a colloidal solution.


One of the following does not show Tyndall effect. This one is :


Name the property of one of the constituents which can be used to separate a mixture of salt and iodine


What is the general name of the process by which tea-leaves are separated from prepared tea ?


Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?


How will you separate camphor, common salt and iron nails from their mixture ?


How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?


Write a few lines on the blackboard with a chalk. Now observe the chalk. What changes do you see in the chalk?


______ is not made of matter.


Justify your answer.

Figure 1 Figure 2 Figure 3

The arrangement of particles in three different phases of matter is shown above.

  1. Which state is represented by Fig. 1?
  2. In which state will the inter-particle attraction be maximum?
  3. Which one of them cannot be contained in an open vessel?
  4. Which one can take the shape of its container?

Rusting of an article made up of iron is called


Evaporation is always accompanied by ______ in temperature. 


Write a scientific reason.

Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.


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