10th Physical Science Bit Bank

101. Na, K etc., were obtained from ……….
102. The second period consists ……. s-block elements and ……. p-block elements.
103. There are ……. elements in the sixth period.
104. ‘4f’ elements are called ………
105. ‘5f’ elements are called ……….
106. The elements with three or less electrons in the outer shell are considered to be ……….
107. Lanthanoids and actinoids are called ……. elements.
108. Metalloids are generally ……….
109. Atomic radius is measured in ……….
110. 1 pico metre = ………. meter.

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111. Atomic radii of elements ……… across a period from left to right.
112. Atomic radii ……… from top to bottom is a group of the periodic table.
113. The size of the chlorine atom is ……… than Cl- ion.
114. The size of Na+ ion is ………. than ‘Na’ atom.
115. The energy required to remove an electron from the outer most orbit or shell of a neutral gaseous atom is called ……….
116. The energy required to remove an electron from unipositive ion of the element is called the ……… of that element.
117. More the nuclear charge ……. is the ionization energy.
118. More the screening effect ……… is the ionization energy.
119. It is …….. to remove 4f electron than 4s.
120. It is …….. to remove one electron from 8O than 7N.
121. More the atomic radius, ……… is the ionization energy.
122. Ionization energy is expressed in ………
123. Electron affinity of an element is also called electron gain ………… of that
element.
124. Electron affinity value for Chlorine is ……..
125. Metals have very …….. electron gain enthalpy values. Ionization energy + ………….
126. Electronegativity = Ionization energy + ………… / 2
127. ……….. assigned the electronegative values for elements on the basis of bond
energies.
128. Metals generally show ……….. electronegative character.
129. Non metals are generally ………. electronegative due to their smaller atomic
radii.
130. Si and Ge are …………

Answers:

101) Plant ash 102) 2, 6
103) 32 104) Lanthanides
105) actinides 106) metals
107) inner transition 108) semi conductors
109) pm (pico meter) 110) 10-12
111) decrease 112) increase
113) less size 114) less
115) ionization energy 116) 2nd ionization energy
117) more 118) less
119) easier 120) easier
121) less 122) kJ mol-1
123) enthalpy 124) -349 kJ mol-1
125) low 126) electron affinity
127) Pauling 128) less
129) more 130) metalloids

II. Match the following.

Group – A Group – B

71. Alkali metal family ( ) A) 13 (III A) group
72. Boron family ( ) B) 14 (IV A) group
73. Halogen family ( ) C) 15 (V A) group
74. Carbon family ( ) D) 17 (VII A) group
75. Nitrogen family ( ) E) 1 (I A) group

Group – A Group – B

76. Law of triads ( ) A) Newlands
77. Periodic law – at. wt. ( ) B) Moseley
78. Periodic law – at. no. ( ) C) Electronic configuration
79. Modern periodic law ( ) D) Dobereiner
80. Law of octaves ( ) E) Mendeleev

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Fill in the blanks:

81. Lithium, ………. and Potassium constitute a Dobereiner’s triad.
82. ……….. was the basis of the classifications proposed by Dobereiner, Newlands and Mendeleev.
83. Noble gases belongs to ……… group of periodic table.
84. The incomplete period of the periodic table is ………..
85. The element at the bottom of a group would be expected to show ………. metallic character than the element at the top.
86. ……… proposed the law of octaves.
87. Newlands periodic table was restricted to only ………….
88. Mendeleev’s periodic law states that the physical and chemical properties of the elements are a periodic function of their ……….
89. There are ……….. vertical columns in Mendeleev’s periodic table called ………..
90. Sub group I A elements are called ……….
91. The horizontal rows in Mendeleev’s periodic table are called ……….
92. Eka-boron is later discovered as ………
93. Eka-aluminium is later identified as ………
94. Eka-silicon is discovered as ……….
95. The melting point of Gallium is ………
96. Atomic weight = Equivalent weight × ………..
97. 101th element was named as ……….
98. ………… realised that the atomic number is more fundamental characteristic of an element than its atomic weight.
99. Modern periodic law states ‘the physical and chemical properties of elements are periodic function of the …….. of their atoms’.
100. Group of elements is also called ……….

Answers:

71-E; 72-A; 73-D; 74-B; 75-C
76-D; 77-E; 78-B; 79-C; 80-A

81) sodium 82) Atomic weight
83) ‘O’ group (18th group) 84) 7th period
85) High 86) Newlands
87) 56 elements 88) atomic weight
89) eight, groups 90) alkali metals
91) periods 92) scandium
93) gallium 94) germanium
95) 32°C 96) valency
97) Mendelevium 98) Moseley
99) electronic configuration 100) element family (or) chemical family