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Arrange the following set of atoms in the order of increasing atomic radius : F, Cl, C, O
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The first atom with maximum number of d-electrons is with atomic number
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Which of the following has minimum ionisation energy?
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The pair of elements that exhibit diagonal relationship is
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Which of the following has minimum ionisation energy
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Elements whose atoms have incompletely filled penultimate and anti-penultimate energy levels are known as
A. Inner Transition elements
B. Representative elements
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Which of the following has maximum electron affinity ?
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In C, N, O and F the electronegativity
B. decreases from C to O and then increases to F
C. increases from O to C and then decreases to F
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Law of octaves was given by
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The heaviest element is
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The element with no definite place in the periodic table is
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Which of the following has maximum ionisation energy?
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The smallest ion amongst the following
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IV Period has.........elements.
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Arrange the following set of atoms in the increasing order of electron affinity: F, Sr, Ge, Se
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The differentiating electron enters in the penultimate energy level in the case of
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Which of the following have negative electron affinity?
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In the periodic table on moving from left to right across a period, the metallic character of elements
C. increases and decreases
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Second electron affinity of the elements is always
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In a Lother Meyer curve sodium occurs at
C. some point on the curve
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Which of the following has maximum ionisation energy ?
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Which of the following elements is not liquid at room temperature, i.e., 25°C?
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Which of the following has highest ionisation energy?
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Ionisation energy is the amount of energy required to remove
A. the most loosely bound electron from an isolated gaseous atom
B. an electron from an atom of an element
C. an electron from an isolated gaseous atom
D. an electron from covalently bonded atom in a molecule
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Elements whose atoms have incompletely filled penultimate energy levels are known as
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On moving across a period from left to right the ionisation energy increases because
A. value of principal quantum number increases
B. effective nuclear charge increases
D. nuclear charge increases
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An atom of an element has electronic configuration , the element belongs to block
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Modem Periodic Law was given by
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Which of the following have maximum size?
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The lightest metal is