Atomic Structure

Question 1

De Broglie theory was proposed on

Answer 1

1924

Question 2

Rydberg formula was given on

Answer 2

1890

Question 3

Explanation of black body radiation given by

Answer 3

Max Planck

1900

Question 4

Einstein explained photoelectric effect on

Answer 4

1905

Question 5

Balmer gave equation for wave number of visible spectral lines of hydrogen on

Answer 5

1885

Question 6

Photoelectric effect was shown by

Answer 6

H Hertz

1887

Question 7

Wave nature of electromagnetic radiation given by

Answer 7

James Maxwell (1870)

Question 8

Thomson model was given on

Answer 8

1898

Question 9

Thomson was awarded Nobel prize on

Answer 9

1906 (physics)

Question 10

Roentgen discovered x rays on

Answer 10

1895

Question 11

Chadwick discovered neutrons on

Answer 11

1932

Question 12

Charge to mass ratio of e- was given by

Answer 12

JJ Thomson in 1897

Question 13

When did scientists start studying about electrical discharge in partially evacuated gas tubes

Answer 13

Mid 1850s

Question 14

Charge to mass ratio of e-

Answer 14

1.7588 x 10^11 C/kg

Question 15

Radius of atom (Thomson model)

Answer 15

10^-10 m

Question 16

Thickness of gold foil in rutherford experiment

Answer 16

100 nm

Question 17

Radius of atom and nucleus (nuclear model)

Answer 17

Atom radius : 10^-10 m

Nucleus radius : 10^-15 m

Question 18

% of protium

Answer 18

99.985%

Question 19

Percentage of deuterium

Answer 19

.015%

Question 20

Radio wave frequency

Answer 20

Around 10^6 Hz

Question 21

Microwave frequency

Answer 21

Around 10^10 Hz

Question 22

Infrared wave frequency

Answer 22

Around 10^13 Hz

Question 23

Max Planck got Nobel prize on

Answer 23

1918 (for quantum theory)

Question 24

Threshold frequency of potassium

Answer 24

5 x 10^14 Hz

Question 25

Albert Einstein got Nobel prize on

Answer 25

1921 (for explanation of photoelectric effect)

Question 26

Electromagnetic wave has both

Answer 26

Wave like and particle like properties

Question 27

Spectrum of visible light frequency

Answer 27

7.5 x 10^14 Hz to 4 x 10^14 Hz

Question 28

One of the first investigators to use line spectra

Answer 28

German chemist, Robert Bunsen

Question 29

R (Rydberg Constant) =

Answer 29

1.1 x 10^7 m^-1

Question 30

1/R =

Answer 30

912 A°

Question 31

Bohr model of H atom given in

Answer 31

1913

Question 32

De Broglie was awarded Nobel prize on

Answer 32

1929

Question 33

Heisenberg was awarded Nobel prize on

Answer 33

1932