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WorksheetsGeometric Representation Of Atomic Structure
Total questions: 25
Worksheet time: 13mins
If the atomic number of an element is 6 and its mass number is 13, how many protons are
contained in the nucleus?
6
7
8
5
An atom that loses or gains electrons is called a(n)
isotope.
proton.
neutron.
ion.
Electronic configuration of 40 Ca20 is
2, 8, 10
2, 8, 8, 2
2, 8, 2, 8
2, 2, 8, 8
Which of the following does not have 8 valence electrons?
Ar
Ne
Kr
He
Which of the following correctly represents the electronic distribution in the Mg atom? .
3, 8, 1
2, 8, 2
1, 8, 3
8, 2, 2
An element has 3 electrons in the valence M Shell. The symbol of the element is ___.
B
Al
Mg
Ga
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
Na+ has 12 neutrons and 10 electrons. Which of the following statements is correct?
Na+ has an atomic number of 10 and mass number 22.
Na+ has an atomic number of 11 and mass number 23.
Na+ has an atomic number of 10 and mass number 23.
Na+ has an atomic number of 11 and mass number 22.
How many electrons, protons and neutrons will be present in X–, if atomic number of X is 9 and mass number is 19?
E = 9, P = 9, N = 10
E = 10, P = 9, N = 10
E = 10, P = 10, N = 10
E = 9, P = 10, N = 10
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 electronic configuration of chlorine is ______________.
2, 7
2, 8, 8, 7
2, 8, 7
2, 7, 8
What is the maximum number of electrons that are allowed in 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 an element have
same mass number.
same atomic number.
different mass number.
both b & c.
The maximum numbers of electron that L-shell can hold is ______.
3
32
18
8
The electronic configuration of Sodium is _________.
2,7,2
2,8,1
2,9
3,7,1
Atoms of the same element having different physical properties, but same chemical properties, are called ______________.
isobars
allotropes
isotopes
isotones
An atom has a mass number of 23 and atomic number 11. The number of protons is _________.
11
12
23
44
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 ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of _____.
5
11
3
8
________, an isotope of hydrogen, has 2 neutrons in its nucleus.
Deuterium
Protium
Tritium
Helium
A neutral atom with 3 protons and 4 neutrons will have an electronic configuration of:
2,4
2,2
2,1
2,5
An element which has 1 electron, 1 proton but no neutron is
Helium
Hydrogen
Deuterium
Tritium
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
Electronic configuration of Neon with mass number 20 and atomic number 10 is ______.
2, 4, 4
2, 8
1, 1, 8
8, 2
