Introduction to Radioactivity

pg. 611-619

LO: I can write out nuclear reactions and identify the type of radiation observed.

What is radioactivity?

Radioactive means…

1.Unstable atomic nucleus (nuclide) breaking down Radioactive Decay

2.Emission of particles as the nucleus changesa. Alpha b.Betac. Gammad.Neutrone.Positron

Unstable vs. StableUnstable nuclei occur because…

1.Electrostatic charge repulsion (repulsion b/w like charged particles)

2.Strong nuclear force b/w particles is weak

Stable nuclei occur because…

1.Equal balance b/w electrostatic charge repulsion & strong nuclear force.

Radioactive Particle Characteristics

Penetration

What type of radioactive decay?

What type of radioactive decay?

Radioactive Decay Equation Format

Radioactive Decay Equations

Radioactive Decay Equations

Tips for Success

1. Be able to recognize and identify the type of radioactive decay (alpha, beta, gamma).

2. Know your isotope symbol notation for isotopes.

3. Realize the law of conservation of matter applies everything on the left of your reaction should equal what is on the right.

Homework

1.Go to www.masteringchemistry.com to access the text.

2.Work on pg. 637-638, # 52-66 EVENs only.

3.Due by Thursday, 10/22