MEDIUM
Earn 100

Why do the transition elements show variable oxidation states?

Important Questions on The d- and f-Block Elements

EASY
Which of the following statements is incorrect for pair of elements Zr - Hf?
EASY
Silver atom has completely filled d orbitals (4d10) in its ground state. How can you say that it is a transition element?
EASY
The basic character of the transition metal monoxide follows the order
EASY
In which of the following pairs, the outermost electronic configuration will be the same?
MEDIUM
Identify the correct statement(s) from the following:
i) There are four d-block series.
ii) Total d-block elements are 40.
iii) Third d-block series starts with Lanthanum and ends with mercury.
iv) All the d-block members are metals and found in nature.
MEDIUM
Number of electrons that Vanadium (Z=23) has in p-orbitals is equal to:
MEDIUM
Which element from the following forms colourless compounds in +2 oxidation state ?
EASY
Identify the element for which electronic configuration in +3 oxidation state is [Ar]3 d5:
EASY
The electronic configuration of a transition element Xin +3 state is [Ar]3d6. Its atomic number is ______
EASY

Match List-I with List-II and select the correct answer using the codes given below:

List-I   List-II  
(A) Electronic configuration of americium. 1. Corrosive Sublimate
(B) BM of Sm3+,La3+,Gd3+ 2. Rn5f7s2
(C) TiCl4H2O Amphoteric white solid 3. 5.9, 0.0, 7.94
(D) Hg2Cl2aquaregia Compound used in antiseptic and dressing skin 4. TiO2

 

EASY
What is the general outer electronic configuration of the coinage metals ?
EASY
Account for the following: Zn, Cd, Hg are considered as d-block elements but not as transition elements.