MEDIUM
10th ICSE
IMPORTANT
Earn 100
Write any two differences in physical states of alkali metals and halogens.
Important Questions on Periodic Properties and Their Variations
EASY
10th ICSE
IMPORTANT
Why does an alkali metal atom is smaller in size than a halogen atom of same period?
This question given in the book seems to have error and the modified question should be as given below.
Why is an alkali metal atom larger in size than a halogen atom of the same period?
EASY
10th ICSE
IMPORTANT
The properties of elements are a periodic function of their_____. (Mass number/ Atomic number)
MEDIUM
10th ICSE
IMPORTANT
An _____ is formed by the gain of electrons of the parent atom. The number of _____ remains the _____ in the anion but nuclear force of attraction for the outer electrons _____. Hence, the distance between _____ and _____ increases due to which anion is _____ than the parent atom.
EASY
10th ICSE
IMPORTANT
What was the major drawback of Newland’s law?
MEDIUM
10th ICSE
IMPORTANT
In Mendeleev’s periodic table, hydrogen was supposed to be
EASY
10th ICSE
IMPORTANT
The element in which outermost shell is completely filled?
MEDIUM
10th ICSE
IMPORTANT
Before modern periodic law, the classification of elements was done on the basis of which property?
EASY
10th ICSE
IMPORTANT
How many elements are present in the period ?
