English

Give a Reason Why Elements Need to Be Properly Classified.

Advertisements
Advertisements

Question

Give a reason why elements need to be properly classified.

Short/Brief Note
Advertisements

Solution

Reason of classification of elements:

  1. It makes the study of elements in an organized manner.
  2. To help and correlate the properties of elements with the fundamental properties of different states of matter.
  3. To help to define the relationship of one element with others.
shaalaa.com
  Is there an error in this question or solution?
Chapter 5: The Periodic Table - Additional Questions

APPEARS IN

Viraf J. Dalal Simplified ICSE Chemistry [English] Class 9
Chapter 5 The Periodic Table
Additional Questions | Q 1.2

RELATED QUESTIONS

The element which can from an acidic oxide should be the one whose atomic number is:

(a) 6
(b) 16
(c) 12
(d) 19


What is the need for classification of elements?


The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.


Example for liquid metal is ______.


Identify the bond between H and F in the HF molecules.


Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?


An element is placed in 2nd Group and 3rd Period of the Periodic Table, burns in presence of oxygen to form a basic oxide.

  1. Identify the element
  2. Write the electronic configuration
  3. Write the balanced equation when it burns in the presence of air
  4. Write a balanced equation when this oxide is dissolved in water
  5. Draw the electron dot structure for the formation of this oxide

An element X of group 15 exists as diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.

  1. Identify the element X. How many valence electrons does it have?
  2. Draw the electron dot structure of the diatomic molecule of X. What type of bond is formed in it?
  3. Draw the electron dot structure for ammonia and what type of bond is formed in it?

Complete the following triads by inserting the missing elements.

Cl, ______, I


Element 'X' forms an oxide with the formula X2O3 which is a solid with high melting point. ‘X’ would most likely be placed in the group of the Periodic Table as:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×