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WorksheetsIsotopes
Total questions: 15
Worksheet time: 7mins
What are isotopes?
Atoms of the same elements which have the same number of protons but different number of neutrons.
Atoms of the same elements which have the same number of electron but different number of neutrons.
Atoms of the same elements which have the same proton number but different number of neutrons.
Atoms of the same elements which have the same number of protons but different nucleon numbers.
Study the table.
Determine a pair of isotopes in the table.
K & M
L & M
K & L
The diagram shows the structure of three atoms. Which pair are isotopes?
P & R
P & Q
Q & R
The diagram shows the symbols of three atoms. Choose a pair of chlorine isotopes.
P & R
P & Q
Q & R
Choose the ALL CORRECT Information about Element show as diagram.
Proton Number = 40
number of neutrons = 20
Proton Number = 20
Nucleon Number = 20
Nucleon Number = 40
Choose the ALL CORRECT definition of Isotopes
Atoms of the same elements which have the same number of protons but different number of neutrons.
Atoms of the same elements which have the same number of electron but different number of neutrons.
Atoms of the same elements which have the same proton number but different number of neutrons.
Atoms of the same elements which have the same number of protons but different nucleon numbers.
Atoms of the same elements which have the same proton number but different nucleon numbers.
A group of archaeologists found a human skeleton
which was believed to be buried thousands of years ago.
They want to estimate the age of the skeleton. What
radioactive substance would they use?
Iodine-131
Cobalt-60
Carbon-14
Uranium-235
Which of the following is the use of Cobalt-60?
To make pests infertile
Determine the thickness of paper
Estimate the age of archaeological specimens
Destroy cancer cells
Substance X is used to generate electrical energy in
nuclear reactors. What is Substance X?
Iodine-131
Uranium-235
Carbon-14
Cobalt-60
Substance Y is used to control the thickness of paper. What is Substance X?
Iodine-131
Americium-241
Carbon-14
Cobalt-60
Choose ALL radioactive substance which used in Agriculture fields.
Iodine-131
Americium-241
Carbon-14
Cobalt-60
Phosphorus-32
Mr. A face the problem of thyroid cancer. What radioactive substance can be used to treat thyroid cancer?
Iodine-131
Americium-241
Carbon-14
Cobalt-60
Table shows the elements W, X, Y and Z with their respective number of protons, number of neutrons and nucleon number.
Which of the following is a pair of isotopes?
W and Y
X and Y
X and Z
Y and Z
Isotope bromine-81 has 35 protons in its atom. What is the nucleon number for this isotope?
35
46
81
116
What is the number of neutrons in magnesium isotope?
12
13
25
37
