BCECE SERIES Physics
Half Life Of Radioactive Elements
1 previous year questions.
Volume: 1 Ques
Yield: Medium
High-Yield Trend
1
2017 Chapter Questions 1 MCQs
01
PYQ 2017
medium
physics ID: bcece-20
Cobalt-57 is radioactive, emitting β-particles. The half life for this is 270 days. If 100 mg of this is kept in an ' open container the mass of Cobalt - 57 after 540 days will be
1
50 mg
2
mg
3
25 mg
4
Zero