Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 2

HARD

10th Chhattisgarh Board

IMPORTANT

Earn 100

The physical and chemical properties of elements belonging to the same group are similar, why?

Important Questions on Periodic Classification of Elements

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 3

Hydrogen should be placed in which group and which period? Give reasons.

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 4

In the given pairs, which element will have the bigger atom? Give reason for your choice.

$Mg$ (atomic number $12$ ) or $Cl$ (atomic number $17$ )

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 4

In the given pairs, which element will have the bigger atom? Give reason for your choice.

$Na$ (atomic number $11$ ) or $K$ (atomic number $19$ )

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 5

The atomic numbers of three elements

A, B

and

C

are

5, 7

and

10

respectively. Which two of these will have similar properties. Give reasons.

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 6

The atomic numbers of three elements are

5, 7

and

10

respectively. Which of these:
(a) Belongs to group

18

(b) Belongs to group

15

(c) Belongs to group

13

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 7

'

A

', '

B

' and '

C

' are three elements that form a triad. If the atomic weight of '

A

' is

7 u

and that of '

C

' is

39 u

then according to Dobereiner's rule of triads what will be the atomic weight of '

B

'?

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 8

The figure shows a part of the periodic table:

$Li$	$Be$	$B$	$C$	$N$	$O$	$F$
$Na$	$Mg$	$Al$	$Si$	$P$	$S$	$Cl$

If we move horizontally from left to right, how does the metallic character of the elements change?

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 8

The figure shows a part of the periodic table:

$Li$	$Be$	$B$	$C$	$N$	$O$	$F$
$Na$	$Mg$	$Al$	$Si$	$P$	$S$	$Cl$

If we move horizontally from left to right, how does electronegativity change?