Radiation Measurement and Decay Processes in Atomic Physics

Mr. Anderson explains radioactive decay, starting with an introduction to radiation and how it is measured using a Geiger counter. He discusses the role of nuclear forces in atomic stability, highlighting the balance of protons and neutrons. The video covers different types of radioactive decay, including alpha, beta, and gamma decay, and explains how these processes help atoms achieve a stable state. Finally, Mr. Anderson demonstrates how to write and balance nuclear equations, using examples like uranium, cesium, and sodium decay.

What device is used to measure radiation by detecting electrical charges from inert gases?

• Thermometer

• Voltmeter

• Spectrometer

• Geiger counter

What force holds the nucleus together despite the repulsion between protons?

• Strong nuclear force

• Electromagnetic force

• Weak nuclear force

• Gravitational force

Which type of decay involves the emission of an electron with a negative charge?

• Alpha decay

• Beta plus decay

• Beta minus decay

• Gamma decay

Which type of radiation is composed of two protons and two neutrons?

• Beta radiation

• Gamma radiation

• Alpha radiation

• X-ray radiation

What is the charge of gamma radiation?

• Positive

• Negative

• Neutral

• Variable

Which type of decay is stopped by a sheet of aluminum foil?

• Neutron decay

• Gamma decay

• Beta decay

• Alpha decay

What happens to uranium 238 during alpha decay?

• It loses two protons and two neutrons

• It gains two protons

• It becomes cesium

• It remains unchanged

In beta minus decay, what happens to a neutron?

• It becomes a proton and emits an electron

• It becomes an electron and emits a proton

• It becomes a neutron and emits a positron

• It remains unchanged

What is the result of beta plus decay in sodium?

• It becomes neon

• It becomes lithium

• It remains sodium

• It becomes magnesium

What is the atomic number of thorium after uranium 238 undergoes alpha decay?

• 90

• 92

• 94

• 88