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WorksheetsStructure of Atoms
Total questions: 20
Worksheet time: 10mins
Which of the following correctly represent the electronic distribution in the Mg atom?
3, 8, 1
2, 8, 2
1, 8, 3
8, 2, 2
Rutherford’s ‘alpha (α) particles scattering experiment’ resulted into discovery of
Electron
Proton
Nucleus in the atom
Atomic mass
Which of the following statements about Rutherford’s model of atom are correct?
(i) considered the nucleus as positively charged
(ii) established that the α–particles are four times as heavy as a hydrogen atom
(iii) can be compared to solar system
(iv) was in agreement with Thomson’s model
(i) and (iii)
(ii) and (iii)
(i) and (iv)
only (i)
An element has 3 valence electrons in its outermost 3rd shell, the name of element is
B
Al
Ga
In
If K, L, M N, shells of an atom are full. The total number of electrons in that atom are :
60
26
42
36
Which of the following are true for an element?
(i) Atomic number = number of protons + number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic mass = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons
(i) and (ii)
(i) and (iii)
(ii) and (iii)
(ii) and (iv)
The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
13
10
14
16
What is the maximum number of electrons that are allowed on the second orbital?
9
7
8
3
What is the mass number of an atom which contains 28 protons, 28 electrons, and 34 neutrons?
28
56
62
90
The isotopes of a same element have:
same mass number.
same atomic number.
different mass number.
both b & c.
The first model of an atom was given by
N. Bohr
E. Goldstein
Rutherford
J.J. Thomson
Which of the following statement is always correct?
An atom has equal number of electrons and protons.
An atom has equal number of electrons and neutrons.
An atom has equal number of protons and neutrons.
An atom has equal number of electrons, protons and neutrons.
An atom has a mass number of 23 and atomic number 11. The number of protons is _________.
11
12
23
44
Which of the following in Fig do not represent Bohr’s model of an atom correctly?
(i) and (ii)
(ii) and (iii)
(ii) and (iv)
(i) and (iv)
The isotopes of a same element have:
(A) same mass number.
(B) same atomic number.
(C) different mass number.
both b & c.
The highest Cricket ground in the world is located in India. Where is it located?
Chail, Himachal Pradesh
Dharamshala, Himachal Pradesh
Nainital, Uttarakhand
Dehradun, Uttarakhand
First University established in India?
University of Calcutta
Delhi University
Banaras Hindu University
Madras University
What is this monument known as and where is it located?
Bibi ka Maqbara, Aurangabad
Taj Mahal, Agra
Jama Masjid, Delhi
Science Day in Switzerland is dedicated to an Indian. Who is this great personality?
C. V. Raman
Vikram Sarabhai
Homi Bhabha
A. P. J. Abdul Kalam
This Indian president took only 50% of his salary, claiming he did not require more than that. Identify this personality.
V. V. Giri
Sarvepalli Radhakrishnan
Dr. Rajendra Prasad
Shankar Dayal Sharma
