Advertisements
Advertisements
Question
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.
Advertisements
Solution
`""_ZS^A -> ""_85R^222 + 2(""_2^4He) + 1 ""_"-1"^0e`
A = 222 + 2(4) + 0
∴ A = 230
Z = 85 + 2(2) + (-1)
∴ Z = 88
APPEARS IN
RELATED QUESTIONS
Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.
Write one use of cathode ray tube.
Represent the change in the nucleus of a radioactive element when a β particle is emitted.
Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions in terms of A, B and C.
1) Name the radiation B which is unaffected by the electrostatic field.
2) Why does the radiation C deflect more than A?
3) Which among the three causes the least biological damage externally.
4) Name the radiation which is used in carbon dating.
Give the relative ionizing power of α, β and γ radiations.
A certain nucleus A (mass number 238 and atomic number 92) is radioactive and becomes a nucleus B (mass number 234 and atomic number 90) by the loss of one particle.
What particle was emitted?
What are the types of emission?
State two properties that a substance should possess when used as a thermionic emitter.
Mention four properties of Becquerel rays.
