Isotopes and Their Properties

Mrs. Toronto explains isotopes, focusing on hydrogen isotopes and their symbols. She discusses the stability of isotopes, using magnesium as an example, and explains how isotopes can become ions. The video also covers radioactive isotopes, their decay, and how this relates to radioactive dating. Students are tasked with a worksheet and lab to reinforce their understanding.

What is the primary factor that causes isotopes to have different atomic masses?

• Different numbers of valence electrons

• Different numbers of protons

• Different numbers of electrons

• Different numbers of neutrons

In an isotope symbol, where is the atomic number located?

• To the left

• On the top

• On the bottom

• To the right

How do you determine the most common isotope of an element?

• By adding the number of protons and neutrons

• By rounding the average atomic mass and subtracting the number of protons

• By counting the number of electrons

• By checking the periodic table for the highest atomic number

What role do neutrons play in the stability of an isotope?

• They affect the element's electrical conductivity

• They act as a glue to hold the nucleus together

• They determine the chemical properties of the element

• They are responsible for the element's color

What happens to isotopes when they become ions?

• They gain protons

• They change into a different element

• They lose neutrons

• They gain or lose electrons

What is a characteristic of radioactive isotopes?

• They have a stable nucleus

• They emit radiation

• They are always positively charged

• They have no neutrons

What is the term for the time it takes for half of a radioactive sample to decay?

• Isotope cycle

• Decay period

• Half-life

• Radioactive duration

What is the purpose of radioactive dating?

• To determine the chemical properties of an element

• To find the number of protons in an isotope

• To estimate the age of a sample

• To measure the electrical conductivity of a material

What is a parent isotope?

• An isotope that has decayed into a daughter isotope

• An isotope that has gained electrons

• An isotope with no neutrons

• An isotope that is stable and does not decay

What is a daughter isotope?

• An isotope that has gained protons

• An isotope that results from the decay of a parent isotope

• An isotope with a higher atomic number

• An isotope that is artificially created