Structure of Atom

Question 1

Charge/mass ratio for electron

Answer 1

1.79×10^11 C/kg

Question 2

Radius of atom

Answer 2

10^-10m

Question 3

Radius of nucleus

Answer 3

10^-15m

Question 4

Formula for wavelength

Answer 4

λ=c/v
Where λ–wavelength
c–speed of light
v–frequency

Question 5

Wavenumber=

Answer 5

Wavenumber=1/wavelength(λ)

Question 6

Planck’s constant (h)

Answer 6

=6.62×10^-34 Js

Question 7

Energy of a quantum radiation

Answer 7

E=hv
Where v –frequency

Question 8

Kinetic energy of the ejected electron

Answer 8

hv=hv°+1/2mv^2

Question 9

Wavenumber of hydrogen spectrum

Answer 9

1/λ=109677{1/(n1)^2 -1/(n2)^2}

Question 10

Spectral lines for Atomic Hydrogen

Answer 10

Series____n1___n2____ Spectral region
——————————————————
Lyman___1___2,3….____Ultraviolet
Balmer___2___3,4….____Visible
Paschen___3__4,5….____Infrared
Brackett___4__5,6….____Infrared
Pfund_____5___6,7….____Infrared

Question 11

Frequency of radiation absorbed/emitted when Transition occurs between two stationary states that differ in energy:-

Answer 11

v=∆E/h

Question 12

angular momentum of an electron:-

Answer 12

mvr=n.h/2π

Question 13

Energy of stationary state of electron:-

Answer 13

E=-R(1/n^2)
where R=2.18×10^-18 J

Question 14

Energy of stationary state of one electron species

Answer 14

E=2.18×10^-18(Z²/n²)J

Question 15

Radii of the unielectron species in stationary state

Answer 15

r=52.9(n²)/Z

Question 16

Heisenberg’s uncertainty principle

Answer 16

∆x.∆v>=h/4πm

Question 17

Quantum numbers

Answer 17

Principal quantum number =n
Azimuthal Quantum number=0–(n-l)
Magnetic orbital quantum number= {2l+1} values are possible
Spin quantum number=1/2 or -1/2
number of orbitals=n
number of nodes =n-1
number of antinodes=n-l-1

Question 18

sequence of orbitals

Answer 18

1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d 7p