EASY
12th ICSE
IMPORTANT
Earn 100

Name two radioactive elements which are not found in observable quantity in nature. Why is it so?

Important Questions on Radioactivity

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 15 - Radioactivity>QUESTIONS>Q 23
Define half-life of a radioactive substance.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 15 - Radioactivity>QUESTIONS>Q 24

Half-life of a certain radioactive element is 3.465 days. Find its disintegration constant.

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 15 - Radioactivity>QUESTIONS>Q 25

Will the number of radioactive particles emitted by an element be same in equal time-intervals? Why?

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 15 - Radioactivity>QUESTIONS>Q 26
How are average life and decay constant related?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 15 - Radioactivity>QUESTIONS>Q 27
What is one curie?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 15 - Radioactivity>QUESTIONS>Q 28
What is the SI unit of decay rate?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 15 - Radioactivity>QUESTIONS>Q 29
What do you mean by ‘radiation hazards’?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 15 - Radioactivity>QUESTIONS>Q 30
What is Roentgen R?