An element has configuration $2, 8, 1$. It belongs to,

Important Questions on Periodic Classification of Elements

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IMPORTANT

PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Formative Assessment>Q 3

In general, the number of electrons in the valence shell may be equal to its 

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IMPORTANT

PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Formative Assessment>Q 4

The non-metallic element present in the third period other than sulphur and chlorine is 

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IMPORTANT

PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Formative Assessment>Q 5

At the end of each period the valence shell is:

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IMPORTANT

PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Formative Assessment>Q 6

The family of elements having seven electrons in the outermost shell is:

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IMPORTANT

PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Formative Assessment>Q 7

Which of the following factors does not affect the metallic character of an element? 

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PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Formative Assessment>Q 8

The family of elements to which potassium belongs is:

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PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Formative Assessment>Q 9

The modern periodic table is given by:

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IMPORTANT

PRACHI SCIENCE CHEMISTRY CLASS-X>Chapter 5 - Periodic Classification of Elements>Formative Assessment>Q 10

Elements belonging to groups $1$ to $17$ are called