EASY
9th ICSE
IMPORTANT
Earn 100

Elements have been arranged in the following sequence on the basis of their increasing atomic masses.
F, Na, Mg, Al, Si, P, S, Cl, Ar, K
Pick two sets of elements which have similar properties.

Important Questions on The Periodic Table

EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 28
Elements have been arranged in the following sequence on the basis of their increasing atomic masses.
F, Na, Mg, Al, Si, P, S, Cl, Ar, K
The given sequence represents which law of classification of elements?
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 29
"Hydrogen occupies a unique position in the modern periodic table". Justify the statement.
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 30
Compare the radii of two species X and Y. Give reasons for your answer.
X has 12 protons and 12 electrons
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 30
Compare the radii of two species X and Y. Give reasons for your answer.
Y has 12 protons and 10 electrons
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 31
Arrange the following elements in the increasing order of their atomic radii.
Li, Be, F, N
EASY
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 31
Arrange the following elements in the increasing order of their atomic radii.
Cl, At, Br, I
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 32
A metal M forms an oxide having the formula, MO. It belongs to 2nd period in the modern periodic table. Write its atomic number and valency.
MEDIUM
9th ICSE
IMPORTANT
All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 33
Write a reaction of alkaline earth metal with oxygen.