19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The electronic configuration of an element is 1s ,2s 2p ,3s 3p 3d ,4s 4p 4d ,5s 5p . From which group of the period table, it belongs ? (KCET 2012)
The correct order of decreasing electronegativity values among the elements I-beryllium, II-oxygen, III-nitrogen and IV-magnesium, is (Kerala CEE 2011)
Which of the following has the highest electron affinity? (AFMC 2011)
The electronegativity of the following elements increases in the order [AFMC 2011]
The increasing order of the density of alkali metal is (Kerala CEE 2011)
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
Which one of the following order is correct for the first ionization energies of the elements?
The correct order of ionization energy of C, N, O, F is
Which of the following has the highest ionization enthalpy?
The bond enthalpy is the highest for
Amongst the elements with the following electronic configurations which one of them may have the highest ionization energy?
In which of the following pair, both the species are isoelectronic but first one is large in size than the second?
The correct order of the sizes of C, N, P, S, is
The ions O2–, F–, Na+, Mg2+and Al3+are isoelectronic. Their ionic radii show
Which of the following order is correct for the size of Fe3+, Fe, and Fe2+?
Among 3rd-row elements atomic size is maximum for
Atomic radii of F and Ne, in Å, are given by
Which one of the following ions has the highest value of ionic radius?
Identify the correct order of the size of the following