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Structure of Atom

Short Answer Type

101.

Give the number of electrons in the species $straight H subscript 2 superscript plus comma space space straight H subscript 2 space and space straight O subscript 2 superscript plus.$

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102.
Write the complete symbol for the atom with the given atomic number (Z) and atomic number (A).
(i) Z = 17, A = 35
(ii) Z = 92, A = 233
(iii) Z = 4, A = 9.

(i) The element with atomic number 17 is Cl. Its symbol is
(ii) The element with atomic number 92 is U. Its symbol is
(iii) The element with atomic number 4 is Be. Its symbol is

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103. An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.

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104. An ion with mass number 37 possesses one unit of negative charge. If the ion contains 11.1 % more neutrons than the electrons, find the symbol of the ion.

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105. An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.

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106.

What is the atomic number and mass number of A³⁺ion with 21 electrons and 25 neutrons?

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107. Explain that atomic number is the fundamental property of an element.

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108.

Define isotopes, isobars and isotones.

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109.

Name different isotopes of hydrogen. Give their atomic numbers and mass numbers.

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110.

Isotopes of an element have similar chemical properties and isobars have different chemical properties. Explain.

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Previous Year Papers

Test Series

Test Yourself

Short Answer Type

102. Write the complete symbol for the atom with the given atomic number (Z) and atomic number (A).(i) Z = 17, A = 35 (ii) Z = 92, A = 233(iii) Z = 4, A = 9.

102.
Write the complete symbol for the atom with the given atomic number (Z) and atomic number (A).
(i) Z = 17, A = 35
(ii) Z = 92, A = 233
(iii) Z = 4, A = 9.