हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Differentiate between an atom and a molecule. - Chemistry

Advertisements
Advertisements

प्रश्न

Differentiate between an atom and a molecule.

अंतर स्पष्ट करें
Advertisements

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.
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Matter and Its Composition - Exercise

APPEARS IN

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

संबंधित प्रश्न

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


Fill in the following blank with suitable words :

The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................


What are the characteristics of matter?


During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of :


Fill in the following blanks with suitable words :

The elements which are sonorous are called ..........................


Give reason why graphite is used for making elecrode in a dry cell.


What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.


What is the most common way of expressing the concentration of a solution ?


Fill in the following blank :

A colloid is a ..............mixture and its components can be separated by the technique known as ...............


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


Fill in the following blanks with suitable words :

The gases of air can be separated by fractional distillation of liquid air because they have different..............


How will you separate iron pins from sand ?


Naphthalene can be separated from sand :


Explain the meaning of the term matter with special reference to the term ‘substance’.


Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?


All the matter made of ______.


Stars including Sun are covered in ______.


Which of the following are homogeneous in nature?

(i) ice

(ii) wood

(iii) soil

(iv) air


The most reactive metal is ______.


Solid is an arrangement of particles ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×