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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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Modem Periodic Law was given by
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Which of the following species have minimum size?
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The element with no definite place in the periodic table is
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, , and are isoelectronic, the order of increasing size is
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Which of the following have maximum size?
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Which of the following has minimum ionisation energy
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An atom of an element has electronic configuration , the element belongs to block
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An element has atomic number 2. It belongs to
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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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Which of the following elements is not liquid at room temperature, i.e., 25°C?
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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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3.Atomic number of an element X is 34, it belongs to
D. IV period, VII A group
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The lightest metal is
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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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Which of the following has highest ionisation energy?
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Which of the following has maximum electron affinity ?
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Which of the following elements have maximum electronegativity?
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In a Lother Meyer curve sodium occurs at
C. some point on the curve
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Law of octaves was given by
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The differentiating electron enters in the penultimate energy level in the case of
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With the increase in atomic number in a period of the periodic table
A. electron affinity decreases
B. metallic character decreases
C. ionisation energy decreases
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Elements whose atoms have incompletely filled penultimate energy levels are known as
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Lother Meyer plotted a graph of
A. Atomic volume versus atomic number
B. Atomic radii versus atomic weight
C. Atomic weight versus mass number
D. Atomic volume versus atomic weight
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Which of the following have negative electron affinity?
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The heaviest element is
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Which of the following is not an s-block element?
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Which of the following has the maximum size?
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Elements belonging to the same period are