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Questions and Answers
What is the primary factor that determines the length of periods in the periodic table?
What is the primary factor that determines the length of periods in the periodic table?
- Arrangement of electrons in different orbits (correct)
- Atomic weight of the elements
- Similar properties of elements
- Number of electrons in the outermost orbit
Why does hydrogen exhibit dual behavior?
Why does hydrogen exhibit dual behavior?
- Due to its ability to gain or lose an electron (correct)
- Due to its electron configuration
- Due to its position in the periodic table
- Due to its atomic weight
What is the significance of the last member of each period being an inert gas?
What is the significance of the last member of each period being an inert gas?
- It indicates the start of a new period
- It explains the dissimilarity with halogens
- It shows the similarity with alkali metals
- It marks the end of a period (correct)
What is the purpose of Dobereiner's law of triads?
What is the purpose of Dobereiner's law of triads?
What is the result of the inclusion of dissimilar elements in the same group but different subgroups?
What is the result of the inclusion of dissimilar elements in the same group but different subgroups?
What is the primary reason for the rare earth elements being placed in the same group in the periodic table?
What is the primary reason for the rare earth elements being placed in the same group in the periodic table?
Which of the following groups in the periodic table has a special arrangement of elements due to lack of space?
Which of the following groups in the periodic table has a special arrangement of elements due to lack of space?
What is the basis of classification of elements in the modern periodic table?
What is the basis of classification of elements in the modern periodic table?
Which of the following elements would occupy the same position in the periodic table?
Which of the following elements would occupy the same position in the periodic table?
What is the advantage of using atomic number as the basis for classification of elements in the periodic table?
What is the advantage of using atomic number as the basis for classification of elements in the periodic table?
What was the basis of Mendeleef's periodic table?
What was the basis of Mendeleef's periodic table?
Which group of elements was added to Mendeleef's original table with the discovery of inert gases?
Which group of elements was added to Mendeleef's original table with the discovery of inert gases?
What is the current basis of the classification of elements in the modern periodic table?
What is the current basis of the classification of elements in the modern periodic table?
How are the elements arranged in Mendeleef's periodic table?
How are the elements arranged in Mendeleef's periodic table?
How many horizontal rows are there in Mendeleef's periodic table?
How many horizontal rows are there in Mendeleef's periodic table?
What is the likely reason for hydrogen's resemblance to both alkali metals and halogens?
What is the likely reason for hydrogen's resemblance to both alkali metals and halogens?
What is the arrangement of elements in the periodic table based on?
What is the arrangement of elements in the periodic table based on?
What is the significance of the last member of each period being an inert gas?
What is the significance of the last member of each period being an inert gas?
Which of the following elements would likely exhibit dual behavior?
Which of the following elements would likely exhibit dual behavior?
What is the result of the periodic arrangement of elements?
What is the result of the periodic arrangement of elements?
What is the effect of the shielding effect on a valence electron in a multi-electron atom?
What is the effect of the shielding effect on a valence electron in a multi-electron atom?
What is the direction of change in atomic radius on moving from left to right in a period?
What is the direction of change in atomic radius on moving from left to right in a period?
What is the relationship between the number of inner electrons and the magnitude of the shielding effect?
What is the relationship between the number of inner electrons and the magnitude of the shielding effect?
What is the term for the distance between the centre of the nucleus and the electrons in the last orbit?
What is the term for the distance between the centre of the nucleus and the electrons in the last orbit?
In which block of elements does the magnitude of the screening constant increase with an increase in atomic number?
In which block of elements does the magnitude of the screening constant increase with an increase in atomic number?
What is the primary reason for the rare earth elements having similar chemical behavior?
What is the primary reason for the rare earth elements having similar chemical behavior?
What anomaly disappears when atomic number is taken as the basis for classification of elements?
What anomaly disappears when atomic number is taken as the basis for classification of elements?
What is the characteristic of the electronic arrangement of rare earth elements?
What is the characteristic of the electronic arrangement of rare earth elements?
What justifies the placement of rare earth elements in the same group in the periodic table?
What justifies the placement of rare earth elements in the same group in the periodic table?
What is the consequence of using atomic number as the basis for classification of elements?
What is the consequence of using atomic number as the basis for classification of elements?
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