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Science
Structure Of Atom
Quiz 2
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Q.1
An electron has a _____ charge.
negative
positive
neutral
All of above
Q.2
Choose the particle that has no charge.
nucleus
neutron
proton
electron
Q.3
The area around the nucleus where elections are located
nucleus
decepticon
electron cloud
borh model
Q.4
The first energy level can hold up to, how many electrons?
8
4
2
5
Q.5
What does the nucleus consist of?
Protons + Electrons
Neutrons + Electrons
Atoms
Protons + Neutrons
Q.6
Which particle has a similar mass to a proton?
Electron
Neutron
Photon
Marble
Q.7
How many electrons are in the element oxygen?
7
10
8
9
Q.8
What is the atomic number for an element with three protons?
2
1
3
6
Q.9
Which statement best describes an electron?
Smaller mass than a proton and a negative charge
Smaller mass than a proton and a positive charge
Greater mass than a proton and a negative charge
Greater mass than a proton and a positive charge
Q.10
The quantum of light is
photon
neutron
electron
proton
Q.11
For principal quantum number n=the total number of orbitals having l=3 is
3
5
7
9
Q.12
Which is the isotone of 32Ge(atomic numberXmass number)
32Ge77
34Ge78
36Ge79
32Ge78
Q.13
Which of the following has the maximum number of unpaired d-electrons?
Ni3+
Cu+
Zn2+
Fe2+
Q.14
Uncertainity in the position of an electron (mass= 9.1 x 10-kg) moving with a velocitym/s, accurate upto 0.will be
5.76 x 10-2 m
1.92 x 10-2 m
3.84 x 10-2 m
19.2 x 10-2 m
Q.15
The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2 xs-1 is 6.x 10-J. The threshold frequency of the metal is
2 x 10-14 s-1
3 x 1014 s-1
1 x 1014 s-1
1 x 10-14 s-1
Q.16
Which of the following is isoelectronic with Ca2+
Fe3+
S2-
Mg2+
P
Q.17
The sub-shell with n=l=2 can accomodate a maximum of
10 electrons
12 electrons
36 electrons
72 electrons
Q.18
Which of the following radiations has largest energy?
λ = 30 nm
λ = 300 pm
ν = 3 x 10-12 s-1
ν = 3 x 10-10 s-1
Q.19
The energy of an electron in 3rd orbit of hydrogen atom is:
-1311.8 kJ/mol
-82.0 kJ/mol
-145.7 kJ/mol
-327.9 kJ/mol
Q.20
The radius of first orbit of hydrogen is 0.Å. The radius of second orbit would be
1.06 Å
0.26 Å
0.53 Å
2.12 Å
0 h : 0 m : 1 s
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