Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 4

HARD

11th CBSE

IMPORTANT

Earn 100

Complete the following table:

Name of the Particle Mass Number Atomic Number Protons Number of Electrons Neutrons

Oxygen $8$ $8$

Sodium ion $23$ $11$

Bromine $35$ $45$

Important Questions on Structure of Atom

EASY

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 5

Find the number of protons, electrons and neutrons in

(a) {}_{13}^{27}{A l^{3 +}} (b) {}_{8}^{15}{O^{2 -}} .

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 6

The elements

P (A t o m i c w e i g h t 39)

and

Q (A t o m i c w e i g h t 80)

contain

20

and

45

neutrons respectively in their nucleus. Give their electronic arrangements separately.

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 7

Give the name and atomic number of the inert gas atom in which the total number of

d

-electrons is equal to the difference between the numbers of total

p

and total

s

electrons.

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 8

A monoatomic anion of unit charge contains

45

neutrons and

36

electrons. Find the atomic number, mass number of the ion with its identification.

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 1

Calculate the frequency of infrared radiations having wavelength,

3 \times 10^{6} n m .

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 2

Calculate the range of frequencies of visible light from

3800 - 7600 Å .

HARD

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 3

How long would it take a radio wave of frequency,

6 \times 10^{3} \sec^{- 1}

to travel from Mars to the Earth, a distance of

8 \times 10^{7} k m ?

MEDIUM

11th CBSE

IMPORTANT

Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>PROBLEMS FOR PRACTICE>Q 4

Calculate the wave number of radiations having a frequency of

4 \times 10^{14} H z .