19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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:
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
Which of the following pairs has almost the same atomic radii?
When a chlorine atom becomes chloride ion, its size
Identify the electronic configuration of transition element.
The elements with atomic numbers 9, 17, 35, 53, 85 are all
An element with atomic number 21 is a
Which of the following represents an excited state of an atom?
The element having electronic configuration [Kr] 4d10, 4f14, 5s2, 5p6, 5d4, 6s2 belongs to
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 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