Radioactive Decay and Isotopes Concepts

This video tutorial explains isotopes, focusing on their definition, the role of atomic numbers, and how isotopes differ in terms of neutrons while maintaining the same number of protons and electrons. It covers examples like hydrogen and chlorine isotopes, discusses radioactive isotopes such as carbon-14, and highlights their applications in fields like medicine and industry. The tutorial concludes with a summary of key points about isotopes and their significance in chemistry.

What determines the identity of an element?

• The number of neutrons

• The number of protons

• The atomic mass

• The number of electrons

Which of the following is a characteristic of isotopes?

• Different number of protons and electrons

• Same number of protons and neutrons

• Different number of protons, same number of neutrons

• Same number of protons, different number of neutrons

What is the isotope of hydrogen with one neutron called?

• Tritium

• Deuterium

• Helium

• Protium

Why does chlorine have a mass number of 35.5?

• It is an average of its isotopes

• It has half a neutron

• It has half a proton

• It is a mistake in the periodic table

How many neutrons does the isotope of chlorine with a mass number of 37 have?

• 17

• 18

• 19

• 20

What happens to carbon-14 during radioactive decay?

• It remains stable

• It becomes carbon-12

• It becomes nitrogen

• It becomes oxygen

What is a radioisotope?

• An isotope with no neutrons

• An isotope with extra electrons

• An isotope that decays by radiation

• An isotope that is stable

Which of the following is a use of radioisotopes?

• Creating new elements

• Increasing atomic mass

• Reducing atomic number

• Generating electricity

How can radioisotopes be used in medicine?

• To increase cell growth

• To reduce pain

• To sterilize equipment

• To create new medicines

What is the main reason radiation is harmful?

• It releases harmful chemicals

• It causes immediate cell death

• It increases body temperature

• The body absorbs the energy released