19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
Generally, the first ionization energy increases along a period. But there are some exceptions. One which is not an exception is (KCET 2010)
Which of the following pairs has almost the same atomic radii?
When a chlorine atom becomes chloride ion, its size
Which of the following ions has the smallest radius?
Which one is the correct order of the size of the iodine species.
In comparison to the parent atom, the size of the
Atomic number is equal to the…. A…. Here, ‘A’ refers to
In 1913, Henry Moseley observed regularity in the characteries…A…of the elements. Here, ‘A’ refers to
Physical and chemical properties of elements are determined by
Lothar Meyer plotted the physical properties such as atomic volume, melting point and ….A…..against atomic weight. Here, A refers to
According to Alexander Newlands, elements are arranged in…..A….order of their atomic weights. Here A refers to
John Alexander Newlands relationship referred to as the …….A…… Here, A refers to
Which of the following is not a Dobereiner’s triad?
Which one of the following ions has electronic configuration Ar 3d ? (Atomic numbers: Mn = 25, Fe = 26, Co = 27, Ni = 28) (CBSE AIPMT 2010) (a) Co (b) Ni (c) Mn (d) Fe
Among the following the third ionization energy is highest for (AMU 2010)
Which of the following atom has largest size
The element with atomic number 36 belongs to ........block in the Periodic Table.
The number of elements present in fifth period of Periodic Table is
An element ‘X’ belongs to the fourth period and fifteenth group of the Periodic Table. Which one of the following is true regarding the outer electronic configuration of ‘X’. It has
Element having electronic configuration 1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p6, 4d10, 5s2, 5p3 belongs to the group in the periodic table
The element with the lowest atomic number that has a ground state electronic configuration of (n-1) d6ns2 is located in the
Which one of the following pair of elements has similar properties?