Molecule
Molecule
Molecules: The smallest particle of an element or compound which is capable of independent existence and shows all the properties of that substance is called a molecule. In general, molecule is a group of two or more atoms that are chemically bonded together. Atoms of the same element or of different elements can join together to form molecules.
Molecules can be divided into two categories:
Elementary Molecules
Molecules of Elements: The molecules of an element contain same type of atoms. Molecules of many elements are made up of one atom of that element.
Illustration: Noble gases like argon , helium
etc.
The molecules of most of the non-metals are made up of more than one atom.
Illustration: A molecule of oxygen consists of two atoms of oxygen and is known as diatomic molecule, Ozone
consists of three atoms of oxygen.
Compound Molecules
Molecules of Compounds: Atoms of different elements join together in definite proportions to form molecules of compounds.
E.g. molecule is made up of hydrogen and oxygen elements in the ratio of 1:8 by mass.
Prediction of Number of Atoms from Mass Ratio: In order to predict the number of atoms from mass ratio, divide the given mass of each element by the atomic mass of the element and calculate the simplest ratio between the obtained moles.
Example: We know that mass ratio of nitrogen and hydrogen in ammonia molecule is 14: 3. As we can see in the picture ammonia molecule is consists fo one N and three H-atoms are present hence, the formula of ammonia is .
Which of the following are the compound molecule ? (a) H2O (b) CO2 (c) O3 (d) NH3 | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following is a molecule having single atom ? | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following is an example of elementary molecule ? | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
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Prisha Gupta
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
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Shivam Rana
7thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
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Hiya Gupta
8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
