Advertisements
Advertisements
Question
88Ra226 experiences three α - decay. Find the number of neutrons in the daughter element.
Advertisements
Solution
Given: Mass number of 88Ra226 = 226
Atomic number of 88Ra226 = 88
Mass number of α = 4
Atomic number of α = 2
After 3 α decay, Mass number of the daughter element will be,
= 226 − (3 × 4)
= 226 − 12
= 214
Atomic number of daughter element is,
= 88 − (3 × 2)
= 88 − 6
= 82
∴ Number of neutrons = 214 − 82
= 132
APPEARS IN
RELATED QUESTIONS
When does the nucleus of an atom tend to become radioactive?
An element `""_ZS^A` decays to `""_85R^222` after emitting 2 α particles and 1 β particle.
Find the atomic number and atomic mass of the element S.
Write one use of cathode ray tube.
In a cathode ray tube state:
(i) the purpose of covering cathode by thorium and carbon.
(ii) the purpose of the fluorescent screen.
(iii) how is it possible to increase the rate of emission of electrons.
Radioactive substances were found to give off three types of rays. Name them. How do they
(a) React to the magnetic field?
(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
What is nucleus of an atom? Compare its size with that of the atom. Name its constitutents. How is the number of these constituents determined by the atomic number its atomic model.
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
Name the Different Radiations Which Are Emitted by the Radioactive Substances.
Are all the radiations mentioned by you, emitted in a single radioactive decay?
Are all the radiations viz. α, β and γ emitted in a single radioactive decay?
A radioactive element is placed in an evacuated chamber. Then the rate of radioactive decay will ______.
