English
Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 10

The Atomicity of phosphorous is ______

Advertisements
Advertisements

Question

The Atomicity of phosphorous is ______

Fill in the Blanks
Advertisements

Solution

The atomicity of phosphorous is 4.

shaalaa.com
  Is there an error in this question or solution?
Chapter 7: Atoms and Molecules - Evaluation [Page 103]

APPEARS IN

Samacheer Kalvi Science [English] Class 10 SSLC TN Board
Chapter 7 Atoms and Molecules
Evaluation | Q II. 10. | Page 103

RELATED QUESTIONS

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


Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.


Define: Atomic number


Define: Mass number : 


What is meant by atomicity ? Explain with two examples.


Write the formulae of the following compounds. Also name the elements present in them.

  1. Water
  2. Ammonia
  3. Methane
  4. Sulphur dioxide
  5. Ethanol

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.

  1. What is (i) solid P (ii) gas Q, and (iii) solid R.
  2. What is the total mass of Q and R obtained from 50 g of P ?
  3. How does the total mass of Q and R formed compare with the mass of P taken ?
  4. What conclusion do you get from the comparison of masses of products and reactant ?
  5. Which law of chemical combination is illustrated by the example given in this problem ?

Molecular compounds are usually formed by the combination between :


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.


Why are the symbols and formulae of substances important?


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


Give a reason why –

Ozone is considered triatomic, but phosphorus a tetratomic molecule.


State the atomicity of the following:

Oxygen


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.  

If a molecule is made of similar kinds of atoms, then it is called ______ atomic molecule.


Define: Atomicity.


Give any two examples for heterodiatomic molecules.


Write any two classifications of a molecule.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×