Radioactive Isotopes

Which is the most accurate form of absolute dating?

• radiometric dating

• erosion rate

• deposition rate

• index fossils

A radioactive element has a half-life of 2 days. What fraction of the parent isotope is left after 6 days?

• 1/2

• 1/4

• 1/8

• 1/3

Tags

NGSS.HS-PS1-8

Which of the following best describes a half-life?

• the mass of a radioactive isotope left after half of a second

• a process dependent on temperature and pressure

• the time it takes for half the mass of a radioactive sample to decay

• a type of chemical reaction

Tags

NGSS.HS-PS1-8

Which of the following particles/rays is needed to balance this nuclear equation?

• alpha particle

• beta particle

• gamma ray

• neutrino

Tags

NGSS.HS-PS1-8

Which of the following isotopes is needed to balance this nuclear equation?

• P-27

• Si-28

• S-27

• Al-27

Tags

NGSS.HS-PS1-8

In a nuclear reaction, the parent isotope is

• an alpha or beta particle

• the stable decay product

• the same as the daughter isotope

• the radioactive (or unstable) isotope.

Tags

NGSS.HS-PS1-8

On the graph, the point where the parent isotope line and the daughter product line intercept is

• the initial amount of radioactive substance

• the half life of the parent isotope

• the half life of the daughter product

• the point at which the parent isotope is stable.

Tags

NGSS.HS-PS1-8

As a sample of a radioactive element decays, its half-life

• decreases

• increases

• stays the same

• doubles

Tags

NGSS.HS-PS1-8

As a the temperature of a radioactive element increases, its half-life will

• decreases

• increases

• stays the same

• doubles

Tags

NGSS.HS-PS1-8

Which of the following particles/rays is needed to balance this nuclear equation?

• alpha particle

• beta particle

• gamma ray

• neutrino

Tags

NGSS.HS-PS1-8