Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Radioactivity was discovered by becquerel which was serendipity in 1986.He observed a peuliar property of uranium salt affecting photographic plate even though when plate was packed  in a light proof  package.
0 0 0
Radioactivity is the spontaneous emission of alpha,beta or gamma rays.It is a nuclear phenomenon and is not affected by physical or chemical changes.
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts