English

What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?

Advertisements
Advertisements

Question

What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?

Answer in Brief
Advertisements

Solution

The elements at the end of the period have 8 electrons in the valence shell.

Ne = 2, 8

Ar = 2, 8, 8

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Periodic Table, Periodic Properties and Variations of Properties - lntext Questions [Page 11]

APPEARS IN

S.P. Singh Concise Chemistry [English] Class 10 ICSE
Chapter 1 Periodic Table, Periodic Properties and Variations of Properties
lntext Questions | Q 19. (ii) | Page 11
Viraf J. Dalal Simplified ICSE Chemistry [English] Class 9
Chapter 5 The Periodic Table
Exercise | Q 3

RELATED QUESTIONS

How does Nature of oxides of elements change on going from left to right in a period of the periodic table?

Give examples in support of your answer.


 How does the tendency to lose electrons change as we go down in group 1 of the periodic table? Why does it change this way?


Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?


An element X belong to 4th period and 17th group, state.

name the family to which it belong.


Which element has:

twice as many electrons in its second shell as in its first shell?


The elements of one short period of the periodic table are given below in order from left to right:
Li  Be  B  C  O  F Ne
(a) To which period do these elements belong?
(b) One element of this period is missing. Which is the missing element and where should it be placed?
(c) Place the three elements, fluorine, beryllium and nitrogen, in the order of increasing electro negativity.
(d) Which one of the above elements belongs to the halogen series?


Atomic number of an element is 16. State

  1. the period to which it belongs
  2. the number of valence electrons
  3. whether it is a metal or non-metal

The elements of one short period of the periodic table are given below in order from left to right: 

Li Be B C O F Ne

One element of this period is missing. Which is the missing element and where should it be placed? 


The position of elements A, B, C, D and E in the periodic table are shown below:

Group 1

Group 2

Group 17

Group 18

 

 

 

D

 

B

C

 

A

 

 

E

State which is most reactive (i) metal (ii) non-metal

 


Based on the group valency of element write the molecular formula of the following compound giving justification:

Compound formed when an element A of group 2 combines with an element B of group seventeen.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×