Launch:10/7   Grab a your binder and immediately take a seat

  Place last night’s homework on your desk

1.  Identify which type of radiation (α, β, or γ) can penetrate the following:

i.  A piece of paper

ii.  A piece of cardboard iii.  A thin piece of wood iv.  A thin piece of metal

v.  A really thick piece of lead

Unit #3: Nuclear Processes

How does the nucleus change during

radioactive decay? Mr. Heffner 10/7/09

What is radioactive decay?   During radioactive decay…

Parent Isotope (Unstable)

Daughter Product (Stable)

α, β, or γ particle

How can we predict the daughter products?

  Three step process   Step #1: Express isotope as a symbol   Step #2: Set-up the equation

  Step #3: Solve and identify the element

Group Review

How many protons does Oxygen-15 have?

How many neutrons does 238

92U have?

How many valence electrons does fluorine (F) have?

Draw Carbon-13.

What is the symbol for an alpha (α) particle?

What is the daughter product for the beta decay

of Bismuth-210?

What is the correct daughter product for the

alpha decay of Francium-226?

What happens to isotopes during alpha and beta

decay that does not during gamma decay?

Draw a labeled diagram that explains radioactive

decay.

Exit Slip 1.  Which of the following is the correct symbol for a γ particle?

a.  42He

b.  24He

c.  0-1e

d. 00γ

Exit Slip 2.  What happens to the nucleus of an atom when it

undergoes alpha decay? a.  The composition of the nucleus does not change

because it only releases energy b.  The nucleus loses two protons and transforms into a

new element due to the change in atomic number c.  The nucleus loses two neutrons and transforms into

a new element due to the change in atomic mass d.  The nucleus loses an electron and does not change

it’s identity

Exit Slip 3.  The transformation of thorium-234 to

protactinium-234 is an example of a.  alpha decay. b.  beta decay. c.  gamma decay.

d.  none of the above.

Exit Slip 4.  Which of the following correctly represents the

alpha decay of Polonium-214?

Exit Slip 5.  Which of the following is the daughter product for

the beta decay of Uranium-236?

a.  23292U

b.  23290Th

c.  23692U

d. 23693Np

Homework   Read Pg.654 & 656

  In your own words, define fission and fusion