Radioactivity

Who am I? I was the first woman to get my doctorate in physics, along with my husband I discovered radium, I won two Nobel Prizes (physics and chemistry), I drove a mobile X-ray unit along the front lines during WWI, and I faced sexism and anti-immigrant discrimination in France.

• Angelina Jolie

• Marie Curie

• Rosalind Franklin

• Cecilia Payne

The type of radioactive particle that can be stopped by a sheet of paper is the _________.

• alpha particle

• beta particle

• gamma ray

• uranium

The most penetrating type of radiation is the ______.

• alpha particle

• beta particle

• gamma ray

• uranium

One type of radioactive device that indicates the intensity of radiation with a clicking sound that increases in frequency as more radiation is present is the _______________.

• bubble chamber

• cloud chamber

• electroscope

• Geiger counter

A helium nucleus with two protons and two neutrons is called a(n) ______________.

• alpha particle

• beta particle

• electroscope

• gamma ray

When the strong force is not sufficient to hold unstable nuclei together permanently, __________.

• nuclear fusion occurs

• a solid becomes a liquid

• the nuclei decay

• carbon-12 becomes carbon-14

Negatively charged particles emitted from the nucleus at high speed are __________.

• alpha particles

• beta particles

• gamma rays

• x rays

The process by which nuclei having low masses are united to form nuclei with larger masses is ________.

• a chain reaction

• a chemical reaction

• nuclear fission

• nuclear fusion

The discovery of radioactivity by Henri Becquerel involved a __________.

• bubble chamber

• chain reaction

• Geiger counter

• photographic plate

The stability of an isotope nucleus depends on the ___________.

• atomic mass

• atomic number

• number of neutrons

• neutron-to-proton ratio