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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.

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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.

Isotopes of an element have same number of electrons and protons but have different number of neutrons. Since chemical properties of elements depend upon atomic number, isotopes of an element have similar chemical properties.
On the other hand, isobars have different number of electrons, protons as well as neutrons. Thus, isobars have different chemical properties.

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