Advertisements
Advertisements
प्रश्न
Moving left to right in the second period, the number of valence electrons _____.
Advertisements
उत्तर
Moving left to right in the second period, the number of valence electrons increases from 1 to 8.
APPEARS IN
संबंधित प्रश्न
Which element has twice as many electrons in its second shell as in its first shell?
In the following set of elements, one element does not belong to the set. Select this element and state why it does not belong:
Oxygen, Nitrogen, Carbon, Chlorine, Fluorine
What happens to the metallic character of the elements as we go down in a group of the periodic table?
Name the element which has the electronic configuration 2, 8, 3?
Select the correct answer
Identify the metalloid
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
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 |
Which type of ion will be formed by elements A, B, and C.
(a) Fill in the blanks and rewrite the completed statements:
(i) ________ group in the periodic table contains elements that are all gases at room temperature.
(ii) Very fine particles mainly scatter ______ light.
What is the common feature of the electronic configuration of the elements at the end of Period 2 and Period 3?
Name or state following with reference to the element of the first three periods of the periodic table.
A covalent compound formed between an element in period 1 and a halogen.
