Q161
Open questionThe modern periodic table was discovered by
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Chemistry GK · all questionsPeriodic Classification of elements
Periodic Classification of elements
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Q162
Open questionElectronegativity when moving from fluorine to chlorine, bromine and then iodine-
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Q163
Open questionAtomic number of actinides . . . . . . . . is?
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Q164
Open questionMendeleev's Periodic Table in . . . . . . . . was published in a German magazine.
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Q165
Open questionThe elements A, B, C, D and E, whose atomic numbers are 2, 3, 7, 10 and 30 respectively, belong to the same period.
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Q166
Open questionIn the modern periodic table, . . . . . . . . and . . . . . . . . each of the periods has two metalloids-
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Q167
Open questionMatch List I with List II.
| List-I | List-II |
| a. Recently named by IUPAC | 1. Fe |
| b. Variable valency | 2. Ds |
| c. Maximum electronegativity | 3. Cl |
| d. Maximum electron affinity | 4. F |
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Q168
Open questionWhich of the given statements is/are correct?
1. The elements of the second group are called alkali metals.
2. The elements of the first group are called alkaline soil metals.
3. Elements of the 17th group are called halogen.
1. The elements of the second group are called alkali metals.
2. The elements of the first group are called alkaline soil metals.
3. Elements of the 17th group are called halogen.
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Q169
Open questionWhere would you find the element of electronic configuration 2, 8, 3 in the modern periodic table?
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Q170
Open questionWhat is the first element of group 17 in the modern periodic table?
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Q171
Open questionIn the modern periodic table, which of the following periods has the highest number of non-metals?
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Q172
Open questionWhose name is associated with the modern periodic table?
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Q173
Open questionThe classification of elements by which of the following leads to the discovery of new elements?
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Q174
Open questionWhat effect is observed, on the size of an atom when an electron is removed and in another case an electron is added to the same atom?
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Q175
Open questionIn the periodic table, as one goes down the group, which property doesn't change?
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Q176
Open questionElements having similar outer shell electronic configuration in their atoms are arranged in
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Q177
Open questionWhat is the name of that inert gas, which is placed in the first period in the modern periodic table.
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Q178
Open questionProposed a present modern periodic table?
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Q179
Open question. . . . . . . ., generally exhibit variable valency.
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Q180
Open questionWhich one among the following is the correct order of reactivity of the elements?
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