EASY
10th CBSE
IMPORTANT
Earn 100

Name two elements that have two electrons in their outermost shells.

Important Questions on Periodic Classification Of Elements

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Short Answer Type Questions>Q 20
Name three elements with completely filled outermost shells.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Short Answer Type Questions>Q 21
What is Dobereiner's law of triads? Explain with the help of one example of a Dobereiner's triad.
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Short Answer Type Questions>Q 22
What is Newlands' law of octaves? Explain with an example.
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Short Answer Type Questions>Q 23
Did Dobereiner's triads also exist in the columns of Newlands' law of octaves? Explain your answer.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Short Answer Type Questions>Q 23
What were the limitations of Dobereiners' classification of elements?
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Short Answer Type Questions>Q 23
What were the limitations of Newlands' law of octaves?
HARD
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Short Answer Type Questions>Q 24
State the periodic law on which Mendeleev's periodic table was based. Why and how was this periodic law changed?
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 2 Chemistry>Chapter 5 - Periodic Classification Of Elements>Short Answer Type Questions>Q 24
Explain why the noble gases are placed in a separate group.