Advertisements
Advertisements
प्रश्न
Name the radioactive element in lanthanoids.
Write the name of radioactive element in lanthanide series.
Advertisements
उत्तर
Promethium (Pm)
संबंधित प्रश्न
The following electronic configuration of elements shows highest oxidation state
Give the electronic configuration of europium (Z = 63).
Explain the trend in an Oxidation state of 3d elements.
Which of the following statements are FALSE about lanthanoids?
(I) They have lower heat of atomization than transition metals
(II) They are soft metals with silvery white colour and densities of about 7 g cm−3.
(III) They react with water to give the metal hydroxide and oxygen gas.
(IV) They form hydroxides, which are covalent and basic.
The only radioactive element among the lanthanoids is ____________.
What is the general molecular formula of the product obtained on reacting lanthanoids (Ln) with nitrogen?
Which is the INCORRECT property of lanthanoids?
Which element among the following lanthanoids has the smallest atomic radius?
The observed electronic configuration of promethium (atomic number 61) is ____________.
Which of the following properties is NOT of lanthanoids?
Which among the following lanthanoids has smallest atomic size?
Give the properties of Lanthanoids.
Which one of the lanthanoids given below is the most stable in divalent form?
Lanthanoids and actinoids resemble in ______.
Which of the following factors may be regarded as the main cause of lanthanoid contraction?
Identify the last element in lanthanoid series.
Which element from following has largest atomic radius?
Write expected and observed electron configurations of 58Ce.
What are the physical properties of lanthanoids?
