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प्रश्न
What is the difference between the molecule of an element and the molecule of a compound? Give one example of each.
What is the difference between the molecules of elements and compounds?
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उत्तर
| Molecule of an element | Molecule of a compound | |
| 1. | It consists of two or more atoms of the same element chemically bonded together. | It consists of two or more atoms of different elements chemically bonded together. |
| 2. | Example: Bromine exists in nature as a diatomic element (Br2), wherein two bromine atoms are covalently bonded to give a molecule of bromine. | Example: A molecule of nitric acid, HNO3, comprises one atom of hydrogen, one atom of nitrogen and three atoms of oxygen chemically bonded together. |
संबंधित प्रश्न
Give the name of the element present in the following compound:
Baking powder
Define: Mass number :
Define: Atomic weight :
What is the atomicity of the following ?
- Oxygen
- Ozone
- Neon
- Sulphur
- Phosphorus
- Sodium
One of the forms of a naturally occurring solid compound P is usually used for making the floors of houses. On adding a few drops of dilute hydrochloric acid to P, brisk effervescence are produced. When 50 g of reactant P was heated strongly, than 22 g of a gas Q and 28 g of a solid R were produced as products. Gas Q is the same which produced brisk effervescence on adding dilute HCl to P. Gas Q is said to cause global warming whereas solid R is used for white-washing.
- What is (i) solid P (ii) gas Q, and (iii) solid R.
- What is the total mass of Q and R obtained from 50 g of P ?
- How does the total mass of Q and R formed compare with the mass of P taken ?
- What conclusion do you get from the comparison of masses of products and reactant ?
- Which law of chemical combination is illustrated by the example given in this problem ?
An element X forms the following compounds with hydrogen, carbon and oxygen :
H2X, CX2, XO2, XO3
State the three valencies of element X which are illustrated by these compounds.
Correct the following statement:
A molecule of sulphur is monoatomic.
Give one example of a triatomic molecule
State the atomicity of the following:
Argon
If a molecule is made of similar kinds of atoms, then it is called ______ atomic molecule.
