Lab: Half-Life

Question 1

Why are pennies good for simulating radioactive atoms? Check all that apply.

Revolt · Accepted Answer

Pennies have two sides—one to represent radioactive form and another to represent nonradioactive form.; You can easily see the two different forms.; You can create a large sample of pennies.; Pennies are not actually hazardous.; The chance of an atom decaying during a half-life cycle is 50%, the same as flipping a coin and getting tails.

Question 2

What other objects could be used to simulate radioactive and nonradioactive nuclei? Check all that apply.

Revolt · Accepted Answer

quarters; a computer that shows pictures of atoms on screen; candy with letters on one side

Question 3

half-life of Lincolnium

Revolt · Accepted Answer

C

Question 4

number of protons in Lincolnium and Memorium

Revolt · Accepted Answer

C

Question 5

number (or fraction) of Lincolnium atoms

Revolt · Accepted Answer

V

Question 6

In this lab procedure, the variable is the number of half-life cycles (time) and

Revolt · Accepted Answer

independent; variable is the number of half-life cycles (time) and: independent; variable is the number (or fraction) of (radioactive) Lincolnium nuclei remaining at that time.: dependent

Question 7

the variable is the number (or fraction) of (radioactive) Lincolnium nuclei remaining at that time.

Revolt · Accepted Answer

dependent

Question 8

Did you read the Student Guide carefully?

Revolt · Accepted Answer

yes

Question 9

The lab procedure you just studied involves several factors, listed below. Some are variable and some are constant. Label each factor below V for variable or C for constant.

Revolt · Accepted Answer

C; initial number of radioactive nuclei: C; number of half-life cycles (time): V; half-life of Lincolnium: C; number of protons in Lincolnium and Memorium: C; number (or fraction) of Lincolnium atoms: V

Question 10

number of half-life cycles (time)

Revolt · Accepted Answer

V

Lab: Half-Life Answers

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