
Which of the following is a transition element?
A.
B.
C.
D.
Answer
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Hint: Transition elements are those elements which are placed between metals and non - metals in periodic table. They are also called d-block elements.
Complete step by step answer:
Let us first explain the periodic table.
According to modern periodic table given by Moslay:
Non - Metals are placed in group to group Inert gases are placed in group 18. And transition elements are placed in group 3 to group 12.
Aluminum belongs to group Therefore, it is metal.
Arsenic belongs to the group therefore it is metalloid.
Rubidium belongs to group . Therefore, it is metal.
Nickel belongs to group , therefore it is transition metal.
So, the correct answer is “Option C”.
Additional information:
The Atomic Number of is
It’s electronic configuration is
.
Since Electronic configuration of is . Therefore, we can write in place of .
The energy of orbital is less than orbital therefore electron enters in orbital first and then orbital therefore electron enters in us first and then Thus last electron in Nickel enters in orbital. Therefore, it is known as elements.
Note:
There are four transition series called as first (4d), second (5d), third (6d) and Fourth (7d). Nickel belongs to the first transition series.
Transition element can be identified by filling electrons in the orbital. If the last electron enters in orbital it is a transition element. Electrons should be filled according to Aufbau principle.
Complete step by step answer:
Let us first explain the periodic table.
According to modern periodic table given by Moslay:
Non - Metals are placed in group
Aluminum
Arsenic
Rubidium
Nickel
So, the correct answer is “Option C”.
Additional information:
The Atomic Number of
It’s electronic configuration is
Since Electronic configuration of

The energy of
Note:
There are four transition series called as first (4d), second (5d), third (6d) and Fourth (7d). Nickel belongs to the first transition series.
Transition element can be identified by filling electrons in the orbital. If the last electron enters in
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