19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Mg and Li are similar in their properties due to (VMMC 2010)
Ease of formation of the cation is favoured by (RPMT 2010)
Which one of the following is correct order of the size? (Haryana PMT 2010)
The electronic configuration of an element is 1s2, 2s22p6, 3s23p3. What is the atomic number of the element which is just below the above element in the periodic table?
The element with atomic number 117 has not been discovered yet. In which family would you place this element if discovered? [Kerala CEE 2009]
Which represents the correct order of the first ionization potential of third-period elements? (AFMC 2009)
The element whose electronic configuration is 1s2, 2s2, 2p6, 3s2 is
The transition elements have a characteristic electronic configuration which can be represented as
Without looking at the periodic table, select the elements of IIIA group of the periodic table (atomic numbers are given) :
Which of the following pairs has both members from the same group of periodic table
In the fourth period of the periodic table, how many elements have one or more 4d electrons?
Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute
Which one of the following ions has the highest value of ionic radius? (DUMET 2008) (a) O (b) B
Which of these have no unit?
The periods in the Periodic Table are numbered from
The vertical columns in the Periodic Table are termed as
Which of the following is the second most electronegative element?
The outermost electronic configuration of the most electronegative element is
Which of the following isoelectronic ions has the lowest ionization energy?
The correct order of second ionization potential of C, N, O and F is
The ionization energy will be maximum for
A neutral atom will have the lowest ionization potential when electronic configuration is
The highest first ionization potential is of
Ionization potential for a noble gas is
Ionisation energy decreases down the group due to