# Atomic Structure Test 8

Total Questions:50 Total Time: 60 Min

Remaining:

## Questions 1 of 50

Question:The radius of an atom is of the order of

$${10^{ - 10}}cm$$

$${10^{ - 13}}cm$$

$${10^{ - 15}}cm$$

$${10^{ - 8}}cm$$

## Questions 2 of 50

Question:Neutron possesses

Positive charge

Negative charge

No charge

All are correct

## Questions 3 of 50

Question:Splitting of signals is caused by

Proton

Neutron

Positron

Electron

## Questions 4 of 50

Question:The proton and neutron are collectively called as

Deutron

Positron

Meson

Nucleon

## Questions 5 of 50

Question:The number of unpaired electrons in the $$F{e^{2 + }}$$ ion is

0

4

6

3

## Questions 6 of 50

Question:A sodium cation has different number of electrons from

$${O^{2 - }}$$

$${F^ - }$$

$$L{i^ + }$$

$$A{l^{ + 3}}$$

## Questions 7 of 50

Question:If the atomic weight of an element is 23 times that of the lightest element and it has 11 protons, then it contains

11 protons, 23 neutrons, 11 electrons

11 protons, 11 neutrons, 11 electrons

11 protons, 12 neutrons, 11 electrons

11 protons, 11 neutrons, 23 electrons

## Questions 8 of 50

Question:Which of the following oxides of nitrogen is isoelectronic with $$C{O_2}$$

$$N{O_2}$$

$${N_2}O$$

$$NO$$

$${N_2}{O_2}$$

## Questions 9 of 50

Question:Nuclei tend to have more neutrons than protons at high mass numbers because

Neutrons are neutral particles

Neutrons have more mass than protons

More neutrons minimize the coulomb repulsion

Neutrons decrease the binding energy

## Questions 10 of 50

Question:Which one of the following is not isoelectronic with $${O^{2 - }}$$

$${N^{3 - }}$$

$${F^ - }$$

$$T{l^ + }$$

$$N{a^ + }$$

## Questions 11 of 50

Question:The nucleus of tritium contains

1 proton + 1 neutron

1 proton + 3 neutron

1 proton + 0 neutron

1 proton + 2 neutron

## Questions 12 of 50

Question:Which one of the following groupings represents a collection of isoelectronic species

$$N{a^ + },\,C{a^{2 + }},M{g^{2 + }}$$

$${N^{3 - }},\,{F^ - },\,N{a^ + }$$

$$Be,\,A{l^{3 + }},\,C{l^ - }$$

$$C{a^{2 + }},\,C{s^ + },\,Br$$

## Questions 13 of 50

Question:Rutherford's alpha particle scattering experiment eventually led to the conclusion that

Mass and energy are related

Electrons occupy space around the nucleus

Neutrons are buried deep in the nucleus

The point of impact with matter can be precisely determined

## Questions 14 of 50

Question:Bohr's model can explain

The spectrum of hydrogen atom only

Spectrum of atom or ion containing one electron only

The spectrum of hydrogen molecule

The solar spectrum

## Questions 15 of 50

Question:When an electron jumps from lower to higher orbit, its energy

Increases

Decreases

Remains the same

None of these

## Questions 16 of 50

Question:Experimental evidence for the existence of the atomic nucleus comes from

Millikan's oil drop experiment

Atomic emission spectroscopy

The magnetic bending of cathode rays

Alpha scattering by a thin metal foil

## Questions 17 of 50

Question:The first use of quantum theory to explain the structure of atom was made by

Heisenberg

Bohr

Planck

Einstein

## Questions 18 of 50

Question:An electronic transition from 1s orbital of an atom causes

Absorption of energy

Release of energy

Both release or absorption of energy

Unpredictable

## Questions 19 of 50

Question:Energy of electron of hydrogen atom in second Bohr orbit is

$$- 5.44 \times {10^{ - 19}}J$$

$$- 5.44 \times {10^{ - 19}}\,kJ$$

$$- 5.44 \times {10^{ - 19}}\,cal$$

$$- 5.44 \times {10^{ - 19}}\,eV$$

## Questions 20 of 50

Question:If change in energy $$(\Delta E) = 3 \times {10^{ - 8}}J,\,\,h = 6.64 \times {10^{ - 34}}J{\rm{ - }}s$$ and $$c = 3 \times {10^8}\,m/s,$$ then wavelength of the light is

$$6.36 \times {10^3}{\rm{{\AA}}}$$

$$6.36 \times {10^5}{\rm{{\AA}}}$$

$$6.64 \times {10^{ - 8}}{\rm{{\AA}}}$$

$$6.36 \times {10^{18}}{\rm{{\AA}}}$$

## Questions 21 of 50

Question:The mass of a photon with a wavelength equal to $$1.54 \times {10^{ - 8}}cm$$ is

$$0.8268 \times {10^{ - 34}}kg$$

$$1.2876 \times {10^{ - 33}}kg$$

$$1.4285 \times {10^{ - 32}}kg$$

$$1.8884 \times {10^{ - 32}}kg$$

## Questions 22 of 50

Question:The wave nature of an electron was first given by

De-Broglie

Heisenberg

Mosley

Sommerfield

## Questions 23 of 50

Question:Calculate de-Broglie wavelength of an electron travelling at 1% of the speed of light

$$2.73 \times {10^{ - 24}}$$

$$2.42 \times {10^{ - 10}}$$

$$242.2 \times {10^{10}}$$

None of these

## Questions 24 of 50

Question:The equation $$\Delta x.\Delta p \ge \frac{h}{{4\pi }}$$ shows

de-Broglie relation

Heisenbergâ€™s uncertainty principle

Aufbau principle

Hundâ€™s rule

## Questions 25 of 50

Question:The correct ground state electronic configuration of chromium atom is

$$[Ar]\,3{d^5}\,4{s^1}$$

$$[Ar]\,3{d^4}4{s^2}$$

$$[AR]3{d^6}4{s^0}$$

$$[Ar]4{d^5}4{s^1}$$

## Questions 26 of 50

Question:2p orbitals have

$$n = 1,\,l = 2$$

$$n = 1,\,l = 0$$

$$n = 2,\,l = 1$$

$$n = 2,\,l = 0$$

## Questions 27 of 50

Question:Chromium has the electronic configuration

$$4{s^1}3{d^5}$$ rather than $$4{s^2}3{d^4}$$ because$$4s$$ and $$3d$$ have the same energy

$$4s$$ has a higher energy than $$3d$$

$$4{s^1}$$ is more stable than $$4{s^2}$$

$$4{s^1}3{d^5}$$ half-filled is more stable than $$4{s^2}3{d^4}$$

## Questions 28 of 50

Question:The electronic configuration of calcium ion $$(C{a^{2 + }})$$ is

$$1{s^2},2{s^2}2{p^6},3{s^2}3{p^6},4{s^2}$$

$$1{s^2},2{s^2}s{p^6},3{s^2}3{p^6},4{s^1}$$

$$1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^2}$$

$$1{s^2},2{s^2}s{p^6},3{s^2}3{p^6}3{d^5}$$

$$1{s^2},2{s^2}2{p^6},3{s^2}3{p^6},4{s^0}$$

## Questions 29 of 50

Question:The number of radial nodes of 3s and 2p orbitals are respectively.

2, 0

0, 2

1, 2

2, 1

## Questions 30 of 50

Question:Which of the sub-shell is circular

$$4s$$

$$4f$$

$$4p$$

$$4d$$

## Questions 31 of 50

Question:For $$p$$-orbital, the magnetic quantum number has value

2

4, â€“ 4

1, 0, +1

0

## Questions 32 of 50

Question:For $$n = 3$$ energy level, the number of possible orbitals (all kinds) are

1

3

4

9

## Questions 33 of 50

Question:How many electrons can be fit into the orbitals that comprise the $${3^{rd}}$$ quantum shell $$n = 3$$

2

8

18

32

## Questions 34 of 50

Question:If the value of azimuthal quantum number is 3, the possible values of magnetic quantum number would be

0, 1, 2, 3

0, â€“ 1, â€“ 2, â€“ 3

0, $$\pm$$1, $$\pm$$2, $$\pm$$ 3$$\pm$$

1, $$\pm$$2, $$\pm$$3

## Questions 35 of 50

Question:The order of filling of electrons in the orbitals of an atom will be

$$3d,\,4s,\,4p,\,4d,\,5s$$

$$4s,\,3d,\,4p,\,5s,\,4d$$

$$5s,\,4p,\,3d,\,4d,\,5s$$

$$3d,\,4p,\,4s,\,4d,\,5s$$

## Questions 36 of 50

Question:The quantum number which may be designated by $$s,\,p,\,d$$ and $$f$$ instead of number is

$$n$$

$$l$$

$${m_l}$$

$${m_s}$$

## Questions 37 of 50

Question:The correct electronic configuration of $$Ti(Z = 22)$$ atom is

$$1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}3{d^2}$$

$$1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^4}$$

$$1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^4}$$

$$1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^1}3{d^3}$$

## Questions 38 of 50

Question:Which of the following configuration is correct for iron

$$1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}$$

$$1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}3{d^5}$$

$$1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}3{d^7}$$

$$1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}4{s^2}3{d^6}$$

## Questions 39 of 50

Question:Which one of the following set of quantum numbers is not possible for $$4p$$ electron

$$n = 4,\,l = 1,\,m = - 1,\,s = + \frac{1}{2}$$

$$n = 4,\,l = 1,\,m = 0,\,s = + \frac{1}{2}$$

$$n = 4,\,l = 1,\,m = 2,\,s = + \frac{1}{2}$$

$$n = 4,\,l = 1,\,m = - 1,\,s = + \frac{1}{2}$$

## Questions 40 of 50

Question:Which of the following orbital is not possible

3 f

4 f

5 f

6 f

## Questions 41 of 50

Question:The outer electronic structure $$3{s^2}3{p^5}$$ is possessed by

Cl

O

Ar

Br

## Questions 42 of 50

Question:The quantum number â€˜mâ€™ of a free gaseous atom is associated with

The effective volume of the orbital

The shape of the orbital

The spatial orientation of the orbital

The energy of the orbital in the absence of a magnetic field

## Questions 43 of 50

Question:The number of orbitals present in the shell with $$n = 4$$ is

16

8

18

32

## Questions 44 of 50

Question:Which of the following electronic configuration is not possible

$$1{s^2}2{s^2}$$

$$1{s^2},2{s^2}2{p^6}$$

$$[Ar]\,3{d^{10}},4{s^2}4{p^2}$$

$$1{s^2},2{s^2}2{p^2},3{s^1}$$

## Questions 45 of 50

Question:Number of unpaired electrons in the ground state of beryllium atom is

2

1

0

All the above

## Questions 46 of 50

Question:How many unpaired electrons are present in $$N{i^{2 + }}$$ cation (atomic number = 28)

0

2

4

6

## Questions 47 of 50

Question:The total number of electrons present in all the $$p$$-orbitals of bromine are

Five

Eighteen

Seventeen

Thirty five

## Questions 48 of 50

Question:Which of the following has the maximum number of unpaired electrons

$$M{g^{2 + }}$$

$$T{i^{3 + }}$$

$${V^{3 + }}$$

$$F{e^{2 + }}$$

## Questions 49 of 50

Question:Aufbau principle is not satisfied by

$$Cr$$ and $$Cl$$

$$Cu$$ and $$Ag$$

$$Cr$$ and $$Mg$$

$$Cu$$ and $$Na$$

## Questions 50 of 50

Question:Which of the following explains the sequence of filling the electrons in different shells