HARD
11th CBSE
IMPORTANT
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 Define ionisation enthalpy. Discuss the factors affecting ionisation enthalpy of the elements and its trends in the periodic table.

Important Questions on Classification of Elements and Periodicity in Properties

MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 11>Chapter 3 - Classification of Elements and Periodicity in Properties>Long Answer Type>Q 51
Justify the given statement with suitable examples— “The properties of the elements are a periodic function of their atomic numbers”.
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 11>Chapter 3 - Classification of Elements and Periodicity in Properties>Long Answer Type>Q 52
Write down the outermost electronic configuration of alkali metals. How will you justify their placement in group 1 of the periodic table?
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 11>Chapter 3 - Classification of Elements and Periodicity in Properties>Long Answer Type>Q 53
Write the drawbacks in Mendeleev’s periodic table that led to its modification.
 
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 11>Chapter 3 - Classification of Elements and Periodicity in Properties>Long Answer Type>Q 54
In what manner is the long form of the periodic table better than Mendeleev’s periodic table? Explain with examples.
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Chemistry - Class 11>Chapter 3 - Classification of Elements and Periodicity in Properties>Long Answer Type>Q 55
Discuss and compare the trend in ionisation enthalpy of the elements of group 1 with those of group 17 elements.