The half-life of a radioactive substance is

Assessment: WAEC SSCE - Physics - 1999 (Objective) Subject: Physics

Question 1 Report

The half-life of a radioactive substance is
Answer Details
The half-life of a radioactive substance is the length of time during which the activity of the substance reduces by 50%. In other words, it is the time required for half of the initial number of radioactive atoms to decay. This means that after one half-life, half of the initial amount of the radioactive substance will have decayed, and after two half-lives, one quarter of the initial amount will remain. The concept of half-life is important in radioactivity, as it can be used to predict the decay rate and the amount of time it will take for a given amount of the substance to decay.
Read lesson note on Structure Of The Atom (Nigeria Only) (WAEC)
View Answer

Related Questions

1

If the force of attraction between the sun and the 1 planets is removed; the planets will
2

A net force of magnitude 0.6N acts on a body of mass 40g, initially at rest. Calculate the magnitude of tire resulting acceleration.
3

Palm oil from a bottle flows out more easily after it as been heated because the
4

The force between molecules of the same substance is termed
5

A motorcyclist, passing a road junction, moves due west for 8 s at a uniform speed of 5ms-1. He then moves due north for another 6 s with the same speed. At ...
6

A body weighing 10N moves with a speed of 5ms-1 in a horizontal circular path of radius 5m. Calculate the . magnitude of the centripetal force acting on the ...
7

A stone of mass 0.7kg is projected vertically , upwards with a speed of 5ms-1. Calculate the maximum height reached. (Take g as 10ms-2 and neglect air resist...
8

The time rate of change of displacement is known as

Download The App On Google Playstore

Everything you need to excel in your exams

Green Bridge CBT Mobile App
Personalized AI Learning Chat Assistant
200,000+ Exam Questions Across IGCSE, JAMB, WAEC & NECO
Over 3,900 Lesson Notes
Offline Support - Learn Anytime, Anywhere
Green Bridge Timetable
Literature Summaries & Potential Questions
Track Your Performance & Progress
In-depth Explanations for Comprehensive Learning