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?

Electronegativity is the tendency of an atom to attract the shared pair of electrons towards itself. That is, when we move across a period, the electronegativity increases. This is because, the effective nuclear charge increases due to the small size of atoms. As a result, the tendency to accept electrons to form negative ions increases.

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 electron affinity change?

Electron affinity is the energy released when one electron is added to any atom. It generally increases across a period as the atomic size decreases and the effective nuclear charge increases across a period.

E M B I B E

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

Chhattisgarh Board Solutions for Chapter: Periodic Classification of Elements, Exercise 2: Exercise

Author:Chhattisgarh Board

Chhattisgarh Board Science Solutions for Exercise - Chhattisgarh Board Solutions for Chapter: Periodic Classification of Elements, Exercise 2: Exercise

Attempt the practice questions on Chapter 4: Periodic Classification of Elements, Exercise 2: Exercise with hints and solutions to strengthen your understanding. Science (Theory & Practical) Class-10 solutions are prepared by Experienced Embibe Experts.

Questions from Chhattisgarh Board Solutions for Chapter: Periodic Classification of Elements, Exercise 2: Exercise with Hints & Solutions

EASY

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 1

The position of which of the following elements is not fixed in the periodic elements:

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?

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 electron affinity change?

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 9

Why did Mendeleev leave gaps in his periodic table? Use an example to illustrate your answer.

HARD

10th Chhattisgarh Board

IMPORTANT

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

Are Dobereiner's triads seen in Newlands' octets? Compare and write.

HARD

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 11

Give the trends shown by the following properties when we go down a group or from left to right in a period in the modem periodic table — valency, atomic size, ionisation potential, electronegativity

MEDIUM

10th Chhattisgarh Board

IMPORTANT

Science (Theory & Practical) Class-10>Chapter 4 - Periodic Classification of Elements>Exercise>Q 12

The electronic configuration of an element $B$ is $2, 8, 7$ and it forms an ionic compound ${AB}_{2}$ with another element $A$ . What is the valency of element $A$ ?