Periodic table review

who discovered the first scientific and systematic periodic table

• Henry Mosley

• Dmitri Mendeleev

• John Dalton

• sir Isaac Newton

alkali metals are kept in ........

• IIA

• IIIA

• IA

• 0

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which group has the strong electronegative character

• alkali metal

• lanthanides

• inert gases

• halogens

choose the metalloid element

• Alumunium

• Germanium

• Silver

• Helium

Sulphur is........

• Non metal

• Metal

• Metalloid

• Inert gases

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Which one is correct ?

• for electronegative elements, reactivity increases with decrease in atomic size in same group

• for electropositive elements, reactivity decreases with decrease in atomic size in same group

• for non metals, reactivity increases with decrease in atomic size

• all of the above

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what happens when we move from top to bottom in group

• valency decreases

• atomic radius increases

• atomic radius decreases

• valence electrons increases

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

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Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

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The horizontal (side to side) rows in the Periodic Table are called

• groups

• families

• periods

• atomic numbers

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