Questions and Answers
What is the main reason for the filling of 3d orbitals before 4p orbitals in the fourth period?
3d orbitals have lower energy
What is the general electronic configuration of elements in Group one (alkali) metals?
ns1
Which of the following periods contains synthetic or man-made radioactive elements?
Seventh period
What is the order of filling of orbitals in the sixth period?
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How many elements are present in the fourth period?
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What is the primary purpose of classifying elements?
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What is the number of groups in the modern periodic table as per IUPAC recommendations?
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What is the reason for the similar properties of elements in a group?
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What is the basis of the modern periodic law?
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What is the total number of periods in the modern periodic table?
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What is the outcome of analyzing the transmitted light in absorption spectrum?
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What is the term used to describe the arrangement of elements in a tabular form according to their properties?
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Which period is the shortest in the periodic table?
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Which group of elements are also called typical or representative elements?
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What is the range of atomic numbers for the Lanthanides?
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Why are Lanthanides and Actinides not merged within the main body of the periodic table?
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What is the notation used to write the electronic configuration of noble gas elements?
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What is the common characteristic of elements in the d-block?
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