Periodic Classification of Elements

Question 1 Define the term valency? Question 2 How does valency vary in a group? Question 3 How does valency vary in a period? Question 4 What is meant by atomic size? Question 5 How does atomic size vary in a group and period? Question 6 Define the term metallic character? Question 7 How does metallic character vary in a group and period? Question 8 What … [Read more...] about Trends In Modern Periodic Table

Question 1 State Modern Periodic Law? Question 2 How many groups and periods are there in Modern periodic table? Question 3 What was the basis of Modern periodic table? Question 4 Define the term group and period in Modern periodic table? Question 5 Define periodicity? Question 6 Explain Long from of Periodic table? Question 7 How were the position of isotopes … [Read more...] about Modern Periodic Table

Question 1 State Mendeleev's Periodic Law ? Question 2 What was the Mendeleev's basis for the classification of elements? Question 3 Which group elements was missing from Mendeleev's original periodic table? Question 4 State the merits of Mendeleev's classification of elements? Question 5 Why did Mendeleev's leave gaps in his periodic table of elements? Question … [Read more...] about Mendeleev’s Periodic Table

Question 1  What is Dobereiner's triad? Give few examples? Question 2 What were the limitations of Dobereiner's classification of elements? Question 3 What is Newland's law of Octaves?Give an example Question 4  What were the limitations of Newland's law of Octaves? Dobereiner's Triads Johann Dobereiner, a German chemist, arranged certain elements with similar … [Read more...] about Earlier Attempts To Classify Elements