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WorksheetsAtomic Structure
Total questions: 25
Worksheet time: 13mins
The maximum number of electrons that can be located in L shell is _____________.
2
18
32
8
The atoms of same element having different physical properties, but same chemical properties, are called _____________.
isobars
allotropes
isotopes
isomers
The capacity of the M shell is __________, but in Potassium, the M shell holds _________ electrons.
2 electrons, 8
18 electrons, 8
8 electrons, 18
32 electrons, 18
Mass number of an element is ___________.
equal to the number of protons
equal to the number of nucleons
equal to the number of electrons
equal to the number of neutrons
Alpha particles consist of _____________.
2 protons and 3 neutrons
2 protons and 1 neutron
2 protons and 2 neutrons
2 protons and 2 electrons
Electronic configuration in an atom was given by ___________.
Bohr and Rutherford
Bury and Rutherford
Bohr and Bury
Rutherford and Maxwell
13Al27 has _____ neutrons.
13
27
14
12
Electronic configuration of 40 Ca20 is
2, 8, 8, 2
2, 8, 10
2, 8, 2, 8
2, 10, 8
With the exception of Helium, all noble gases have _____ electrons in their valence shell.
2
18
8
32
An isotope of hydrogen is ______________.
Polonium
Deuterium
Titanium
Helium
The lightest noble gas is ______________.
Argon
Neon
Chlorine
Helium
Tritium, an isotope of hydrogen, has _____________ in its nucleus.
1 neutron
2 protons
2 neutrons
1 electron
The physical properties such as mass, density, melting point and boiling point of isotopes are __________.
same
different
similar
sometimes equal
Electronic configuration of Neon with atomic mass 20 and atomic number 10 is _____________.
2, 8, 8, 2
2, 8
2, 6, 2
2, 8, 10
The number of protons present in Chlorine with atomic number 17 and mass number 35 is ________.
35
17
18
16
A neutral atom with 3 protons and 4 neutrons will have an electronic configuration of ________.
2,4
2,2
2,1
2,5
Which of the following is 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 pf protons = number of electrons
(i) and (ii)
(i) and (iii)
(ii) and (iii)
(ii) and (iv)
Which of the following statements 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
The electronic configuration of Si is _________.
2, 8, 2
2, 8, 4
2, 8, 6
2, 8, 3
An element which has 1 electron, 1 proton but no neutron is
Helium
Hydrogen
Deuterium
Tritium
If K, L, M and N shells of an atom are full, the total number of electrons in that atom are _________.
60
26
42
36
What is the mass number of an atom which contains 28 protons, 28 electrons, and 34 neutrons?
28
56
62
90
The isotopes of an element have
same mass number.
same atomic number.
different mass number.
both b & c.
Carbon-12 atom has_______________.
6 electrons, 12 protons, 6 neutrons
12 electrons, 6 protons, 6 neutrons
6 electrons, 6 protons, 6 neutrons
18 electrons, 6 protons and 6 neutrons
An element has 3 valence electrons and has 3 shells. The name of the element is _________.
Boron
Aluminium
Magnesium
Chlorine
