wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Structure of Atom

Total questions: 73

Worksheet time: 37mins

Name
Class
Date
1.

The spectral line in hydrogen spectrum obtained when the electron jumps from n=5 to n=2 energy level belongs to:

a)

Lyman series

b)

Balmer series

c)

Paschen series

d)

Pfund series

2.

The correct set of four quantum numbers for the balance electron of rubidium atom

(z=37) is

a)

5, 1, 1, +1/2

b)

6, 0, 0, +1/2

c)

5, 0, 0, +1/2

d)

5, 1, 0, -1/2

3.

In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the

a)

Wavelength of incident light

b)

Frequency of incident light

c)

Velocity of incident light

d)

Atomic mass of the element

4.

Which spectra is known as fingerprint spectra?

a)

Continuous emission spectra

b)

Line emission spectra

c)

Absorption spectra

5.

What are the possible values of the magnetic quantum number for an electron in a 3p orbital?

a)

-3, -2, -1, 0, +1, +2, +3

b)

-2, -1, 0, +1, +2

c)

-1, 0, +1

d)

0

6.

The probability of finding the electron in a certain space around the nucleus is known as:

a)

Schrödinger's equation

b)

Wavefunction

c)

Orbital

d)

Quantum numbers

7.

The correct electronic configuration of Cr (Z=24) is

a)

[Ar] 3d 5 4s 1

b)

[Ar] 3d 4 4s 2

c)

[Ar] 3d 9 4s 2

d)

[Ar] 3d 10 4s 1

8.

Which of the above is violation of Pauli’s exclusion principle ?

a)

A

b)

B

c)

C

d)

D

9.

The radius of first orbit of hydrogen is 0.53 Å. The radius of second orbit would be

a)

1.06 Å

b)

0.26 Å

c)

0.53 Å

d)

2.12 Å

10.

The energy of an electron in 3rd orbit of hydrogen atom is:

a)

-1311.8 kJ/mol

b)

-82.0 kJ/mol

c)

-145.7 kJ/mol

d)

-327.9 kJ/mol

11.

Which of the following radiations has largest energy?

a)

λ = 30 nm

b)

λ = 300 pm

c)

ν = 3 x 10-12 s-1

d)

ν = 3 x 10-10 s-1

12.

The sub-shell with n=6, l=2 can accomodate a maximum of

a)

10 electrons

b)

12 electrons

c)

36 electrons

d)

72 electrons

13.

Which of the following is isoelectronic with Ca2+

a)

Fe3+

b)

S2-

c)

Mg2+

d)

P

14.

The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2 x 1014 s-1 is 6.63 x 10-20 J. The threshold frequency of the metal is

a)

2 x 10-14 s-1

b)

3 x 1014 s-1

c)

1 x 1014 s-1

d)

1 x 10-14 s-1

15.

Uncertainity in the position of an electron (mass= 9.1 x 10-31 kg) moving with a velocity 300 m/s, accurate upto 0.001% will be

a)

5.76 x 10-2 m

b)

1.92 x 10-2 m

c)

3.84 x 10-2 m

d)

19.2 x 10-2 m

16.

Which of the following has the maximum number of unpaired d-electrons?

a)

Ni3+

b)

Cu+

c)

Zn2+

d)

Fe2+

17.

The quantum of light is

a)

photon

b)

neutron

c)

electron

d)

proton

18.

Which is the isotone of 32Ge76 (atomic numberXmass number)

a)

32Ge77

b)

34Ge78

c)

36Ge79

d)

32Ge78

19.

For principal quantum number n=4, the total number of orbitals having l=3 is

a)

3

b)

5

c)

7

d)

9

20.

Which of the following is not possible?

a)

n=3, l=2, m=0

b)

n=1, l=0, m=0

c)

n=3, l=3, m=2

d)

n=4, l=3, m=-3

21.

There may be a maximum of ____ p orbitals at a given energy level.

a)

2

b)

6

c)

3

d)

8

22.

This shape is that of a...

a)

s orbital

b)

d orbital

c)

p orbital

d)

f orbital

23.

The spin of an electron is represented by this variable:

a)

n

b)

m

c)

L

d)

s, ms

24.

This is a ____ orbital

a)

s

b)

d

c)

p

d)

d

25.

The principle quantum number, n, represents the:

a)

spin value

b)

suborbital value

c)

energy level

d)

magnetic value

26.

Orbital sublevels, or L, represents:

a)

orbital color

b)

orbital shape

c)

electron spin

d)

energy level

27.

Orbital sublevels, or L, represents:

a)

orbital color

b)

orbital shape

c)

electron spin

d)

energy level

28.

The proper pair of the L value with the orbital shape.

a)

0; f

b)

3; p

c)

1; s

d)

2; d

29.

How many electrons total are found in the f orbital?

a)

2

b)

6

c)

10

d)

14

30.

Electrons that have not been excited are said to be at:

a)

high level

b)

base line

c)

set state

d)

ground state

31.

n=4, l=3?

a)

4f

b)

4d

c)

3s

d)

3p

32.

Which of the following is incorrect about the quantum variable m, or ml?

a)

m = -l...l

b)

the value for p is -1, 0, 1

c)

when l is 2, there are 5 values for m

d)

the value is either +1/2 or -1/2

33.

What is the maximum number of electrons that can be found in the n3 energy level

max number= 2n²

a)

3

b)

6

c)

8

d)

9

e)

18

34.

Which of the following sub levels correspond to n=3 l=2

l = 0–>n-1

a)

2p

b)

3s

c)

3p

d)

3d

e)

3f

35.

Which of the following sub levels does not exist

a)

2p

b)

3d

c)

2d

d)

5f

e)

4f

36.

It is the quantum number that describes the energy of an orbital and its atomic size.

a)

Azimuthal Quantum Number

b)

Principal Quantum Number

c)

Spin Quantum Number

d)

Magnetic Quantum Number

37.

It is the quantum number that describes the "shape" of the orbital.

a)

Principal Quantum Number

b)

Angular Momentum Quantum Number

c)

Magnetic Quantum Number

d)

Spin Quantum Number

38.

It is the quantum number that describes the orientation of the orbital in space and can have a value of -ℓ to +ℓ.

a)

Principal Quantum Number

b)

Angular Momentum Quantum Number

c)

Magnetic Quantum Number

d)

Spin Quantum Number

39.

Which of the following set of quantum numbers is not valid?

a)

2,0,0,1/2

b)

2,0,1,1/2

c)

2,1,1,1/2

d)

2,1,0,1/2

40.

What does the 1 in "1s" stand for?

a)

energy level

b)

s orbitals

c)

p orbitals

d)

the number of electrons

41.

Which has exceptional configuration

a)

Cr

b)

Sc

c)

Fe

d)

Cl

42.

To which group does Arsenic belong

a)

13

b)

14

c)

15

d)

16

43.

Atomic number of last noble gas

a)

86

b)

120

c)

118

d)

108

44.

Magnetic moment of N

a)

Square root of 15

b)

Suarez root of 3

c)

Square root of 8

d)

0

45.

Which set is correct

a)

n =1 l=1 m=0

b)

n=5 l=2 m=0

c)

n=2 l=0 m=1

d)

n=3 l=-2 m=0

46.

Which is true about 1st orbit of H and He+

a)

H>He+

b)

H=He+

c)

H<He+

d)

None

47.

Which is NOT unit of charge

a)

esu

b)

Ampere*second

c)

Coulomb

d)

Angstrom

48.

No of unpaired e in Fe+3

a)

4

b)

5

c)

3

d)

0

49.

All lanthanoids belong to group

a)

3

b)

4

c)

5

d)

16

50.

Which is transition element

a)

Ca

b)

Xe

c)

P

d)

Ti

51.

How many orbitals can have the following set of quantum numbers, n = 3, l = 1, ml = +1 ?

a)

3

b)

1

c)

4

d)

2

52.

Radial nodes present in 3s orbital are

a)

3

b)

1

c)

2

d)

4

53.

Most penetrating radiation of a radioactive element is

a)

β\beta ray

b)

α\alpha ray

c)

γ\gamma ray

d)

none of these

54.

the principal quantum number describes

a)

shape of orbital

b)

size of the orbital

c)

spin of electron

d)

energy of each orbital

55.

The electronic configuration of an element is 1s² 2s² 2p6 3s² 3p6 3d5 4s1. It represents

a)

anionic state

b)

ground state

c)

excited state

d)

none of the above

56.

The total number of orbitals in a shell having principal quantum n is

a)

n2

b)

2n2

c)

n3

d)

n+1

57.

The ion iso-electronic with CO+ is

a)

N2-

b)

O2-

c)

N2+

d)

None of the above

58.

The energy of electron in the first Bohr orbit of H atom is -13.6 eV. The possible energy value (s) of the excited state(s) for electron in Bohr orbitals of hydrogen is (are)

a)

-3.4 eV

b)

+3.4 eV

c)

-6.8 eV

d)

All of these

59.

What is the wavelength of light. Given energy = 2.9 × 10-19 J, h = 6.36 × 10-34 Js, c = 3.0 × 108 m/s?

a)

656 nm

b)

670 nm

c)

0.656 nm

d)

65.6 nm

60.

Bohr atomic model could explain

a)

the spectrum of hydrogen molecule

b)

spectrum of an atom or ion containing one electron only

c)

the spectrum only

d)

the spectrum of hydrogen atom only

61.

In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the

a)

Wavelength of incident light

b)

Frequency of incident light

c)

Velocity of incident light

d)

Atomic mass of the element

62.

The series of lines present in the visible region of the hydrogen spectrum is

a)

Lyman

b)

Balmer

c)

Paschen

d)

Brackett

63.

For which of the following species, Bohr's theory is not applicable?

a)

Be 3+

b)

Li 2+

c)

He 2+

d)

H

64.

Planck's constant has the units of

a)

Work

b)

Energy

c)

Angular momentum

d)

Linear momentum

65.

When the electron of a hydrogen atom jumps from n=4 to n=1 state, the number of spectral lines emitted is

a)

15

b)

6

c)

9

d)

3

66.

Which of the following has the largest de-Broglie wavelength, provided all have equal velocity?

a)

CO2 molecule

b)

Electron

c)

NH4 molecule

d)

Proton

67.

Which of the following relates to photons both as wave motion and as a stream of particles?

a)

Interference

b)

E = mc2

c)

Diffraction

d)

E =hv

68.

The energy possessed by one mole of photons is called

a)

One joule

b)

One electron volt

c)

One einstein

d)

One joule second

69.

Balmer series of the hydrogen spectrum lies in the ___________ region

a)

UV

b)

Visible

c)

Far Infrared

d)

Near Infrared

70.

The different orbits or energy levels of an atom according to Bohr Model are called

a)

Excited states

b)

Stationary states

c)

Ground state

d)

Energy levels

71.

Limiting line of any spectral series in the hydrogen spectrum is the line when n2 in the Rydberg formula is

a)

Two

b)

Four

c)

Infinity

d)

Zero

72.

According to Heisenberg Uncertainty Principle, the product of uncertainty in position and uncertainty in momentum should be =

a)

h/π

b)

h/4π

c)

h/3π

d)

h/2π

73.

Which spectra is known as fingerprint spectra?

a)

Continuous emission spectra

b)

Line emission spectra

c)

Absorption spectra

Similar Resources on Wayground

CHEM QUIZ 1

78 questions

CHEM QUIZ 1

quiz

Worksheet

•

9th Grade - Professio...