Intro To Half-Life PhET Lab (Radioactive Dating Game)

Intro To Half-Life PhET Lab (Radioactive Dating Game) essay assignment

Intro To Half-Life PhET Lab (Radioactive Dating Game) essay assignment

Introduction: ​Dead things decay into simpler molecules. Radioactive particles decay. Is it the same kind of decay? What does it mean when a substance is radioactive? In this simulation, you will investigate the concept of half-life.

Neutron: ​a subatomic particle of about the same mass as a proton but without an  electric charge, present in all atomic nuclei except those of ordinary hydrogen.

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Isotope:​ each of two or more forms of the same element that contain equal numbers  of protons but different numbers of neutrons in their nuclei, and hence differ in relative  atomic mass but not in chemical properties; in particular, a radioactive form of an  element.

Radioactive dating:​a method of dating geological or archeological specimens by  determining the relative proportions of particular radioactive isotopes present in a  sample.

Decay: ​decay the half-life is the length of time after which there is a 50%  chance that an atom will have undergone nuclear decay. It varies depending on  the atom type and isotope, and is usually determined experimentally.

 

​Procedure:​ ​PhET​–​Simulations — Chemistry ​– ​Radioactive Dating Game

∙ ​Take some time and play with the simulation. Those atoms are radioactive! How cool is that?!

∙ ​How many ​protons ​does Carbon-14 have? ​6​ ​(hint…what is its atomic number?)

∙ ​How many ​neutrons ​does Carbon-14 have?​ ​8​ ​(hint: the mass – the atomic number)

∙ Add a ​Carbon-14 ​atom to the play area. What happens to that Carbon-14 atom?

​∙ Add more Carbon-14 atoms one at a time. ​Do all the Carbon-14’s decay at the same time?​ ​No

∙ ​Add 50 Carbon-14s. (click five times.) What happens? ​The carbons adds up

Does Carbon-14 ever get to zero? ​No

​∙ and Start with 20 Carbon-14s atoms each time. Pause after the time period indicated. Record the number of C-14 and N-12 atoms. Calculate the percentage of each. Reset before the next round.