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Science CBSE Homework Assignments
Class 9
Structure of the atom
Isotops, Isobars and isotones
2.
Isotopes
Task:
2
m.
State whether true or false. If false, correct the statement:
a
.
The mass of an electron is about \(\frac{1}{2000}\)
times that of proton.
True
False
A proton's mass is roughly \(\frac{1}{2800}\) times that of an electron.
An electron has a mass of nearly \(\frac{1}{2000}\) times that of a proton.
b
.
An isotope of iodine is used for making tincture iodine, which is used as a medicine.
False
True
Making tincture iodine, which is used as a medicine, requires an isotope of iodine.
An isotope of iodine is used as a tracer to determine the manner and rate of iodine intake by the thyroid gland in our body.
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