Structure Of Atom

Question 1

Dalton regarded atom as ultimate particle of matter. T or F

Answer 1

True

Question 2

Is air good or bad conductor of electricity

Answer 2

Bad, it shows conductivity at v low pressure and high voltage

Question 3

What happens when gas ionises

Answer 3

Give cathode rays

Question 4

Fluorescent screen in cathode tube lined with which material

Answer 4

ZnS or Zinc SULPHIDE

Question 5

Which rays are produced by cathode rays

Answer 5

X rays

By falling on heavy solids

Question 6

What is charge to mass ratio of electron

Answer 6

1.75 into 10^11 C/Kg

Question 7

Anode rays discovered by and another name

Answer 7

Goldstein, canal or positive rays

They are the 2H+ from H2

Question 8

Is charge to mass ratio more for proton or electron

Answer 8

Electron

Question 9

Cathode ray discovered by

Answer 9

JJ Thompson through crookes or cathode ray tube

Question 10

Neutron discovered by

Answer 10

Chadwick

Question 11

What is alpha particle

Answer 11

He 2+

Question 12

Charge to mass ratio descending order with e, p, n, alpha

Answer 12

Question 13

Answer 13

Question 14

Who discovered x ray

Answer 14

Roentgen

Question 15

What charge on beta rays

Answer 15

-e, faster and more penetrative than alpha

Question 16

Charge on gamma rays

Answer 16

Neutral, most penetrative and part of electromagnetic spectrum

Question 17

Highest charge to mass ratio between alpha, beta and gamma

Answer 17

Beta- show maximum effect on photographic plate

Question 18

Alpha, beta and gamma are part of electromagnetic spectrum. T or F

Answer 18

False, alpha and beta are not

Question 19

Cathode rays have same e/m ratio as

Answer 19

Beta rays

Question 20

Formula for angular momentum and centrepetal force

Answer 20

mvr

mv^2/r

Question 21

Radius of atom and nucleus according to Rutherford

Answer 21

10^-10 and 10^-15 m

Question 22

Drawbacks of Rutherford

Answer 22

Question 23

Formula for radius of nucleus

Answer 23

Question 24

What relationship did Mosley’s experiment of frequency

Answer 24

Frequency proportional to square of at. number

Question 25

Si of frequency

Answer 25

Hertz or per second

Question 26

Relationship between velocity, frequency and wave length

Answer 26

Question 27

What is inverse of frequency and wavelength

Answer 27

Question 28

Electromagnetic waves given by and travel speed

Answer 28

James Maxwell, speed of light c= nu into lamda

Question 29

Electromagnetic spectra mnemonic and greatest wavelength and frequency sides

Answer 29

RMIVUXGC Rami Vuitton X ray GC R or radio has greatest wavelength and gamma cosmic side has greatest frequency Radio, Micro, Infrared, X ray, Gamma, Cosmic

Question 30

Relationship of energy and frequency according to Planck and value of his constant

Answer 30

Question 31

Formula for power

Answer 31

Question 32

Formula for intensity

Answer 32

More intensity= more E = more photons

Question 33

Convert E in eV to wavelength

Answer 33

Question 34

1 calorie and eV equals how many joules

Answer 34

Question 35

Value of hc

Answer 35

Question 36

Photoelectric effect discovered by

Answer 36

Hertz

Question 37

Graph of K.E and intensity. What happens when intensity increases

Answer 37

Question 38

What is stopping energy equal to and formula in photoelectric effect. Also formula for stopping potential

Answer 38

Question 39

What happens with increasing frequency and intensity in photoelectric effect

Answer 39

More frequency = more kinetic energy More intensity or brightness = more electrons ejected

Question 40

Graph of intensity vs wavelength with different temperature

Answer 40

Question 41

What happens with rise in temperature to the emitted radiation of a hot body

Answer 41

Shifts to shorter wavelengths

Question 42

Bohr theory is only applicable for

Answer 42

Single electron atoms Based on particle nature

Question 43

Represent this postulate through formula

Answer 43

Question 44

Answer 44

Question 45

Formula for calculating velocity and radius of a single electron in an atom of n orbit and Z atomic number

Answer 45

Question 46

How is circumference and time period proportional to n and Z

Answer 46

Question 47

Formula for potential, kinetic and total energy

Answer 47

Question 48

Relationship of total energy with kinetic and potential

Answer 48

Question 49

Total energy of nth orbit in J/atom and eV/atom.

Answer 49

Question 50

Relationship between ionisation energy and En

Answer 50

Question 51

Name of each shell from nucleus’s to outer. Also for extra, energy of each shell and difference between them

Answer 51

Question 52

Formula for wavelength of absorbed or emitted rays

Answer 52

Question 53

Formula for total number of spectral lines

Answer 53

Question 54

Name of different series in Hydrogen spectra and under which region they fall

Answer 54

Question 55

Formula for number of spectral lines of any particular series

Answer 55

Question 56

Value of inverse Rydberg constant

Answer 56

912 Å

Question 57

What is Zeeman and stark effect

Answer 57

Question 58

According to debrogli hypothesis relationship between wavelength and momentum. Also give wavelength formula in terms of K.E and voltage

Answer 58

Question 59

Relationship between circumference and wavelength

Answer 59

Question 60

Heisenberg uncertainty formula

Answer 60

Question 61

Value of ħ

Answer 61

h/2 pi

Question 62

What is psi and psi squared

Answer 62

Question 63

Formula of angular momentum of sub shell

Answer 63

Question 64

For a given principle quantum number n what is number of sub shells, orbitals and max electrons

Answer 64

Question 65

What is energy order of single and multi electron system

Answer 65

Question 66

For a given azimuthal quantum number l, what is formula for number of orbitals

Answer 66

2l +1

Question 67

Formula for spin angular momentum

Answer 67

Question 68

What are nodes and formula for its 2 kinds

Answer 68

Question 69

What is the shape of s and p subshell

Answer 69

Question 70

What is the shape of d subshell

Answer 70

Question 71

What is aufbau principle

Answer 71

Sequence of subshell filling based on energy level

Question 72

What is hund rula of maximum multiplicity

Answer 72

Each orbital should be singly occupied or degenerate or same energy then only pairing starts

Question 73

What is Pauli exclusion principle

Answer 73

No 2 electrons can have all same values of 4 quantum numbers (or an orbital can have only 2 electrons of opposite spin)

Question 74

Formula of magnetic moment

Answer 74

Question 75

What is para and diamagnetic

Answer 75

Question 76

Number of electrons in Scandium, chromium, Manganese, iron, cobalt,

Answer 76

21, 24, 25, 26, 27

Question 77

Which orbital is represented

Answer 77