shaalaa.com
S

Solution - Position of Elements and Trends in the Modern Periodic Table

Account
User


Login
Register


      Forgot password?
Share
Notifications

View all notifications
Books Shortlist
Your shortlist is empty
ConceptPosition of Elements and Trends in the Modern Periodic Table  

Question

The atomic numbers of three elements A, B and C are 12, 18 and 20 respectively. State, giving reason, which two elements will show similar properties.

Solution

You need to to view the solution
Is there an error in this question or solution?

Similar questions VIEW ALL

Which element has  the electronic configuration 2, 8, 2?

view solution

What is meant by 'group' in the modern periodic table? How do the following change on moving from top to bottom in a group?

(i) Number of valence electrons

(ii) Number of occupied shells

(iii) Size of atoms

(iv) Metallic character of element

(v) Effective nuclear charge experienced by valence electrons

view solution

Study the following table in which positions of six elements A, B, C, D, E and F are shown as they are in the modern periodic table:

Group→

 

Period↓

1

 

 

2

 

 

3-12

 

 

13

 

 

14

 

 

15

 

 

16

 

 

17

 

 

18

 

 

2A    B  C
3   DE   F

On the basis of the above table, answer the following questions:-

(i) Name the element which forms only covalent compounds.

(ii) Name the element which is a metal with valency three.

(iii) Name the element which is a non-metal with valency three.

(iv) Out of D and E, which is bigger in size and why?

(v) Write the common name for the family to which the elements C and F belong.

view solution

Taking the example of an element of atomic number 16, explain how the electronic configuration of the atom of an element relates to its position in the modern periodic table and how valency of an element is calculated on the basis of its atomic number.

view solution

Two elements ‘A’ and ‘B’ belong to the 3rd period of Modern periodic table and are in group 2 and 13, respectively. Compare their following characteristics in tabular form:-

(a) Number of electrons in their atoms

(b) Size of their atoms

(c) Their tendencies to lose electrons

(d) The formula of their oxides

(e) Their metallic character

(f) The formula of their chlorides

view solution
Solution for concept: Position of Elements and Trends in the Modern Periodic Table. For the course 8th-10th CBSE
S