Transition elements are those elements whose two outermost shells are incomplete. Elements in d block in modern periodic table come under transition elements that is partially filled or any element which can form stable cations with incompletely filled d orbital.
- All d-block elements (groups 3-12) are transition elements except Zinc, Cadmium, and Mercury because of filled d orbital.
- paramagnetic in nature because most of the transition metals have unpaired electron in their electronic configuration.
- Transition metals often form colorful compounds due to d-d electronic transitions.
- They exhibit high melting and boiling points, as well as good conductivity.
- Transition elements commonly act as catalysts due to their ability to change oxidation states during reactions.
The f-block elements are termed as inner transition elements because the last electron enters the anti-penultimate shell. f-block elements are divided into two series, namely lanthanoids and actinoids.
There are 18 groups and 7 periods in the modern periodic table. Total elements are 118 out of which 91 are metals, 7 are metalloids, and 20 are non-metals.
📌 Remember elements like boron, silicon, germanium, arsenic, antimony, tellurium and Astatine show both metals and non- metals properties falls under the category of the metalloid.
TRANSITION ELEMENTS MULTIPLE CHOICE QUESTION
Q. What are transition elements ? [RRB ALP 2018]
(a) Elements whose two outermost shells are incomplete
(b) Elements which possess properties of both metals and non- metals
(c) They have eight electrons in the outermost shell
(d) Elements whose three outermost shells are incomplete
Q. Which among the following is not a characteristic of transition metals ? [SSC CHSL 2017]
(a) Tendency to gain electrons
(b) Low electronegativity
(c) Low ionization energy
(d) Malleability
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