Advertisements
Advertisements
Question
Give a reason why –
Ozone is considered triatomic, but phosphorus a tetratomic molecule.
Advertisements
Solution
Ozone is considered triatomic because it is composed of three atoms while phosphorous is composed of four elements therefore it considered as tetratomic molecule.
APPEARS IN
RELATED QUESTIONS
Write down the name of a compound represented by the following formula:
Al2(SO4)3
Write down the name of a compound represented by the following formula:
K2SO4
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
Write down the name of a compound represented by the following formula:
CaCO3
Give the name of the element present in the following compound:
Quick lime
State the term.
The number of atoms present in a molecule of an element _________
Define: Atomic number
What is meant by atomicity ? Explain with two examples.
In what form does oxygen gas occur in nature ?
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 A forms an oxide A2O5.
What is the valency of element A ?
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.
Calculate the mass of 3.011 × 1024 atoms of carbon.
Give one example of a triatomic molecule
State the main points of the contradiction of Dalton’s atomic theory by the Modern Atomic Theory.
Give a reason why –
Helium is considered monoatomic, but hydrogen a diatomic molecule.
State the atomicity of the following:
Neon
State the atomicity of the following:
Oxygen
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. |  |
The Atomicity of phosphorous is ______
Two elements sometimes can form more than one compound.
Derive the relationship between Relative molecular mass and Vapour density.
Write any two classifications of a molecule.
