Periodic Classification of Elements
The type of elements present in group 3 to 12[IB to VIIB and VIII] are :
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Single Choice
There are many elements in the periodic table which exhibit variable valency. This is a particular characteristic of :
Arepresentative elements
Btransition elements
Correct Answer
Cnoble gases
Dnon-metals
Solution
Transition elements show variable valency. (n-1) d and ns electrons are of nearly same energy level. Most of these electrons take part in chemical bonding. Thus, they show various valencies.
Example: iron with outer electronic configuration $$3d^64s^2$$ show common valencies of $$+2$$ and $$+3$$.
SIMILAR QUESTIONS
Periodic Classification of Elements
Which of the following sets of atomic numbers corresponds to the atomic numbers of inert gases belonging to periods which contain 4d and 5d transition series?
Periodic Classification of Elements
An element having electronic configuration $$ [Ar] 3d^24s^2 $$ belongs to:
Periodic Classification of Elements
Give the formula and valency of chromate.
Periodic Classification of Elements
Which give coloured carbonate precipitate?
Periodic Classification of Elements
Which of the following is not correct statement for periodic classification of elements?
Periodic Classification of Elements
Indicate the wrong statement on the basis of the periodic table.
Periodic Classification of Elements
Which of the following is a transition element?
Periodic Classification of Elements
Give the formula and valency of chromate.
Periodic Classification of Elements
What are transition elements ? Why are they so called ? Name the different transitions series.
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