An element X is present at the left corner of modern periodic table. State whether it would be a metal or a non-metal.

Important Questions on The Periodic Table

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 26

Why alkali metals are good reducing agents?

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 27

Can the following groups of elements be classified as Dobereiner's triad?
Na, Si, Cl
(Atomic mass of Be $9$ ; Na $23$ ; Mg $24$ ; Si $28$ ; Cl $35$ ; Ca $40$ )
Explain by giving a reason.

EASY

9th ICSE

IMPORTANT

All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 27

Can the following groups of elements be classified as Dobereiner's triad?
Be, Mg, Ca
(Atomic mass of Be $9$ ; Na $23$ ; Mg $24$ ; Si $28$ ; Cl $35$ ; Ca $40$ )
Explain by giving a reason.

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
Pick two sets of elements which have similar properties.

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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?

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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.

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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