Advertisements
Advertisements
प्रश्न
Give a reason why –
Helium is considered monoatomic, but hydrogen a diatomic molecule.
Advertisements
उत्तर
Helium (He) is considered monoatomic because it contains one atom while hydrogen contains two-atom (H2) therefore it considered as a diatomic molecule.
APPEARS IN
संबंधित प्रश्न
Write down the name of a compound represented by the following formula:
CaCl2
Write down the name of a compound represented by the following formula:
KNO3
Give the name of the element present in the following compound:
Quick lime
Give the name of the element present in the following compound:
Baking powder
Define: Atomic number
Define: Atomic number
In what form does oxygen gas occur in nature ?
In what form do noble gases occur in nature?
What is the difference between the molecule of an element and the molecule of a compound? Give one example of each.
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 ?
What are (i) ionic compounds, and (ii) molecular compounds ? Give two examples of each type of compounds.
The cation of an element has :
Molecular compounds are usually formed by the combination between :
Correct the following statement:
A molecule of sulphur is monoatomic.
Explain the term – molecules. Give three examples of atoms of the same element forming a molecule. State the atomicity of the same.
Give one example of a triatomic molecule
State the atomicity of the following:
Argon
State true of false. If false, give the correct statement.
NaCl represents one molecule of sodium chloride.
Classify the following molecules as the molecules of element or compound
| 1. |  |
|
| 2. |  |
|
| 3. |  |
|
| 4. |  |
Which of the following is a triatomic molecule?
Define: Atomicity.
Give any two examples for heterodiatomic molecules.
