The three elements A, B, and C have 3, 4, and 2 electrons respectively in the outermost shell. Give the group number to which they belong in the modern periodic table. Also, give their valencies.
The three elements A, B, and C have 3, 4, and 2 electrons respectively in the outermost shell. Give the group number to which they belong in the modern periodic table. Also, give their valencies.
Step 1:L Modern Periodic Table:
The modern periodic table constitutes 118 elements in total. It contains 18 groups and 7 periods.
Step 2:
Group 14 contains elements having 4 electrons in their valence shell. Hence element A belongs to group 14. Also, the valency of the element will be +4.
Group 13 contains elements having 3 electrons in their valence shell. Hence element B belongs to group 13 having valency +3.
Group 2 contains elements having 2 electrons in their valence shell. Hence element C belongs to group 2 having valency +2.
Step 1:L Modern Periodic Table:
The modern periodic table constitutes 118 elements in total. It contains 18 groups and 7 periods.
Step 2:
Group 14 contains elements having 4 electrons in their valence shell. Hence element A belongs to group 14. Also, the valency of the element will be +4.
Group 13 contains elements having 3 electrons in their valence shell. Hence element B belongs to group 13 having valency +3.
Group 2 contains elements having 2 electrons in their valence shell. Hence element C belongs to group 2 having valency +2.
