Chloride of an element A gives neutral solution in water. In the periodic table, the element A belongs to
The heaviest atom amongst the following is
The element with atomic number 36 belongs to______block in the periodic table.
Aluminium is diagonally related to (in periodic table)
Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S,..
who is called the father of chemistry
Which of the following is metalloid
Differentiating electron in inner transition elements enters the_____ orbital.
Which of the following is the atomic number of a metal
Which of the following pairs has both members from the same period of the periodic table
The elements having the electronic configuration, [Kr]
The element with configuration
If an atom has electronic configuration
The long form of periodic table has
In the periodic table going down in Fluorine group
Beryllium shows diagonal relationship with
Element of atomic number 6 is placed in
Which of the following elements are analogous to the lanthanides
Which of the following statement is not correct regarding hydrogen atom
The most important active step in the development of periodic table was taken by
The tenth elements in the periodic table resembles with the
The elements with atomic number 10,18,36,54, and 86 are all
On moving from left to right across a period in the table the metallic character
The formation of the oxide ion (O)^-2(g), from oxygen atom requires first an exothermic, and then an endothermic step as shown bel..
the first ionization potential of Na is 5.1 ev. the value of electron
The electronic configuration of an element is (1s)^2 (2s)^2 (2p)^6 (3s)^2 (3p)^3. What is the atomic number of the element, which ..
The electronic configuration (1s)^2, (2s)^2, (2p)^6, (3s)^2, (3p)^6, (3d)^9 represents a
the charge/size ratio of a cation determines its polarizing power
Which of the following element is metalloid?
An element with atomic number 21 is a
Smallest among these species is
Which pair has both members from the same period of periodic table?
Which of the following is not a periodic property?
The number of d - electrons in Fe2+ (Z=26) is not equal to the number of electrons in which one of the following
beryllium and aluminium exhibit many properties which are similar.
Which of the following have the largest ionic size?
In the periodic table metals usually used as catalyst belong to
The only non-metal which is liquid at ordinary temperature is
Ionisation energy and election affinity are defined at
The electron affinity of Be is almost similar to that of
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