# Radioactive decay

10 videos

### Mass defect and binding energy

VIDEO
11:28 minutes

Using the mass defect to calculate the energy released when a helium nucleus formed. Introduction to the nuclear strong force.

### Nuclear stability and nuclear equations

VIDEO
8:25 minutes

Using the ratio of neutrons to protons to figure out of a nucleus will be stable or radioactive.

### Writing nuclear equations for alpha, beta, and gamma decay

VIDEO
8:07 minutes

Writing nuclear equations for alpha, beta, and gamma decay.

### Half-life and carbon dating

VIDEO
12:31 minutes

Carbon dating is a real-life example of a first-order reaction. This video explains half-life in the context of radioactive decay.

### Half-life plot

VIDEO
6:47 minutes

Definition of half-life and graphing the decay of phosphorus-32. Calculating how much phosphorus-32 remains after 57.2 days.

### Exponential decay formula proof (can skip, involves calculus)

VIDEO
12:22 minutes

Showing that N(t)=Ne^(-kt) describes the amount of a radioactive substance we have at time T. For students with background in Calculus. Not necessary for intro chemistry class.

### Introduction to exponential decay

VIDEO
9:19 minutes

Introduction to Exponential Decay. Using the exponential decay formula to calculate k, calculating the mass of carbon-14 remaining after a given time, and calculating the time it takes to have a specific mass remaining .

### More exponential decay examples

VIDEO
7:22 minutes

A few more examples of exponential decay. Practice calculating k from half-life, and calculating initial mass.

### Exponential decay and semi-log plots

VIDEO
10:16 minutes

Using exponential decay equation to solve for relationship between k and half-life. Using semi-log plot to get graph of a straight line with slope of -k.