Advertisements
Advertisements
प्रश्न
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
उत्तर
- Element A has 3 valance electrons so, its valency is 3 and it belongs to group 13 in the modern periodic table.
- Element B has 4 valance electrons so, its valency is 4 and it belongs to group 14 in the modern periodic table.
- Element C has 2 valance electrons so, its valency is 2 and it belongs to group 2 in the modern periodic table.
APPEARS IN
संबंधित प्रश्न
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same group of the periodic table?
Which element has the electronic configuration 2, 8, 2?
State how the valency of elements varies in a period of the periodic table?
Name the type of elements which have two electrons in the outermost orbit.
What is the main characteristic of the last element in each period of the periodic table?
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
Name the cation and the anion in the salt – calcium sulphate
Give the symbol and valency of the following element and radical.
Sulphate
The modern periodic table is divided into which blocks?
How does the property vary in periods and in groups?
