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)
Electronic configuration of an element X having atomic number 24 is (UP CPMT 2010)
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 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)
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?
Which of the following is the second most electronegative element?
Alkali metals in each period have
In a periodic table, on moving from left to right along a period, the metallic character of an element
Correct order of first ionization potential among the following elements Be, B, C, N, O is
The element which has highest first ionization energy in the periodic table is
Identify the correct order in which the ionic radius of the following ions increases (I) F– (II) Na+ (III) N3–
In isoelectronic species of Mg2+, N3–, Al3+, the order of decreasing ionic radii will be
The single covalent radius of P is 0.11 nm The single covalent radius of Cl will be :
Arrange the following elements in the order of increasing atomic size Cl, S, P, Ar
The correct order of ionic size of N3–, Na+, F–, Mg2+ and O2–is:
Which of the following pairs has almost the same atomic radii?
When a chlorine atom becomes chloride ion, its size