Chemistry>Chapter 7 - Modern Periodic Table>Just think

EASY

11th Maharashtra Board

IMPORTANT

Earn 100

Give some other examples of periodic events.

Important Questions on Modern Periodic Table

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Can you recall?

What does the principal quantum number

' n'

and azimuthal quantum number

' l'

of an electron belonging to an atom represent?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Can you recall?

Which principle is followed in the distribution of electrons in an atom?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Exercises>Q 1

Explain why the element

Li, B, C, Be

and

N

have the electronegativities

1.0, 2.0, 2.5, 1.5

and

3.0

respectively on the Pauling scale?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Exercises>Q 1

Explain why- The atomic radii of

Cl, I

and

Br

are

99, 133

and

114

pm

, respectively?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Exercises>Q 1

Explain why the ionic radius of

F^{-}

and

{Na}^{+}

are

133

and

98

pm

, respectively?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Exercises>Q 1

Explain why:

{}_{13}{Al}

is a metal,

{}_{14}{Si}

is a metalloid and

{}_{15}P

is a non-metal?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Exercises>Q 1

Explain why-

Cu

forms coloured salts while

Zn

forms colourless salts?

EASY

11th Maharashtra Board

IMPORTANT

Chemistry>Chapter 7 - Modern Periodic Table>Exercises>Q 2

Write the outer electronic configuration of the following using orbital notations method. Justify.

$Ge$ (belongs to period $4$ and group $14$ )