Cognito - Types of radiation

What are isotopes?

• Forms of an element with the same number of protons but different neutrons

• Forms of an element with the same number of neutrons but different protons

• Particles emitted during radioactive decay

• Types of nuclear radiation

How many of an element's isotopes are typically stable?

• All of them

• Half of them

• None of them

• Only one or two

What does it mean when a material is described as radioactive?

• It can glow in the dark

• It consists of stable isotopes

• It consists of unstable isotopes that can decay

• It emits alpha particles only

What are alpha particles made of?

• Two protons and two neutrons

• Two protons and two electrons

• Two electrons and two neutrons

• One proton and one neutron

What can stop alpha particles?

• Thick sheets of lead

• A single sheet of paper

• Several meters of air

• A few centimeters of air

What are beta particles?

• High-speed protons

• Electrons

• Electromagnetic waves

• Neutrons

What is required to stop gamma rays?

• A few centimeters of air

• A single sheet of paper

• Thick sheets of lead or multiple meters of concrete

• Five millimeters of aluminum

How are gamma rays different from alpha and beta radiation?

• They have a positive charge

• They are waves of electromagnetic radiation

• They are only emitted by stable isotopes

• They are particles with mass

What happens when a nucleus emits a neutron?

• It turns into a different element

• It increases its stability

• It becomes positively charged

• It becomes more unstable