S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 30

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9th ICSE

IMPORTANT

Earn 100

Name or state the following with reference to the elements of the first three periods of the periodic table:

An alkaline earth metal in Period $2$ .

Important Questions on Periodic Table

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IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 1

What is the need for the classification of elements?

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9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 2

A

,

B

and

C

are the elements of a Dobereiner’s triad. If the atomic mass of

A

is

7

and that of

C

is

39

, what should be the atomic mass of

B

?

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IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 2

What is Dobereiner’s Law of Triads?

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IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 2

Why was Dobereiner’s Law of Triads discarded?

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IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 3

What is Newland’s Law of Octaves? Explain with the help of examples.

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IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 3

Why was the Newland’s Law of Octaves discarded?

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9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 4

Elements lithium, sodium and potassium were placed in one group on the basis of their similar properties. What are those similar properties?

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9th ICSE

IMPORTANT

S. Chand's ICSE CHEMISTRY Book -1 CLASS- 9>Chapter 6 - Periodic Table>Questions>Q 4

Elements lithium, sodium and potassium were placed in one group on the basis of their similar properties.
What is the usual name of this group?