EASY
10th ICSE
IMPORTANT
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Newlands proposed the law of according to which eighth element, starting from a given one, is a kind of the repetition of the first, like the eighth note of an active in music.

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Important Questions on Periodic Classification of Elements

EASY
10th ICSE
IMPORTANT
Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 4
_____ arranged the known elements in order of their increasing atomic weight in the form of a table called Periodic Table.
EASY
10th ICSE
IMPORTANT
Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 6
Anomalies in the arrangement of elements based on increasing atomic mass could be removed when elements were arranged in order of increasing _____ number, a fundamental property of element discovered by Moseley.
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 1
When Mendeleev started his work, 63 elements were known.
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 2
It was assumed by Newlands that only 56 elements existed in nature and no more elements would be discovered in the future.
EASY
10th ICSE
IMPORTANT
Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 3
The elements in a group have consecutive atomic numbers.
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 4
Mendeleev included the noble gas elements in his periodic table.
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 5
An element with an electronic configuration  2, 8, 4 is a group 14 element.
MEDIUM
10th ICSE
IMPORTANT
Science Chemistry>Chapter 5 - Periodic Classification of Elements>ASSESSTMENT>Q 6
Valency changes down the group.