Uploaded March 2019 | Updated September 2026, 2 hours ago

---

Explains radioactivity, first discovered in 1896 by Henri Becquerel. Marie and Pierre Curie discovered two additional radioactive elements in 1898, polonium and radium. All three won the Nobel prize for physics in 1903. Marie won another Nobel prize in 1911 for chemistry. She was the first woman to win the Nobel prize and one of two people to have won two Nobel prizes, the other being Linus Pauling.

Social Media for Step by Step Science:
Teacher Pay Teachers Store: tinyurl.com/y6d2cdfj
Instagram: instagram.com/stepbystepscience101
Website: stepbystepscience.com
Blog: stepbystepscience.com/blog
Link Tree: https://linktr.ee/stepbystepscience

This video can be shared at: youtu.be/REgCktLmILI

Support my channel by doing all of the following:
(1) Subscribe, get all my physics, chemistry and math videos
(2) Give me a thumbs up for this video
(3) Leave me a nice positive comment
(4) Sharing is Caring, sharing this video with all of your friends