Radioactivity and Nucleus Discovery

Who discovered radioactivity?

• Albert Einstein

• Isaac Newton

• Henri Becquerel

• Marie Curie

What are the three types of radiation emitted during radioactive decay?

• Alpha rays, beta rays, and gamma particles

• Alpha particles, beta particles, and gamma rays

• Delta particles, beta particles, and gamma rays

• Alpha particles, beta rays, and gamma particles

What is the unit used to measure radioactivity?

• Becquerel (Bq)

• Curie (Ci)

• Sievert (Sv)

• Gray (Gy)

Who discovered the nucleus of an atom?

• Marie Curie

• Isaac Newton

• Niels Bohr

• Ernest Rutherford

What is the charge of the nucleus of an atom?

• Positive

• Zero

• Neutral

• Negative

What is the mass of the nucleus of an atom compared to the whole atom?

• 75%

• 99.95%

• 90%

• 50%

What is the name of the process by which an unstable nucleus emits radiation?

• Nuclear fusion

• Particle collision

• Chemical reaction

• Radioactive decay

What is the most common element used in nuclear reactors?

• Uranium

• Plutonium

• Thorium

• Hydrogen

What is the main source of energy in the sun?

• Solar panels

• Coal combustion

• Wind turbines

• Nuclear fusion

What is the process by which two light nuclei combine to form a heavier nucleus?

• Atomic bonding

• Nuclear fusion

• Nuclear fission

• Chemical reaction