Monthly Archives: March 2016

Class of: 31-Mar-2016.

Today we started Chapter 11: we covered Section 11.1: Nuclear Reactions (p. 307).

Learning Objectives:

• Students will be able to explain the concept of artificial radioactivity and combine atoms to form unstable isotopes.
• Students will be able to describe ways of reducing radiation exposure.
• Students will be able to relate energy to mass using Einstein’s equation.

Did you know? One joule of energy is the amount of energy it takes to lift a 1 pound object 9 inches upwards against gravity. That’s about the energy it takes to lift an apple one foot into the air. Cool!

Please work through the following review problems:

p. 311 # 1-15

Check out the instructions and marking check-list here:

Sci 10 10.L

The lab report will be due on Tuesday, 5-Apr-2016.

We will have a small quiz next class: Thursday, 31-Mar-2016!

You will need to know about to calculate the number of protons, neutrons, and mass number. You will need to know about the three different types of decay: alpha, beta, and gamma, and how to write equations for each of them. You will also need to know how to solve problems about half-life (like the sample problems we went over in section 10.4).

Class of: 29-Mar-2016.

Today we covered Section 10.4: Half-Life (p. 290).

Learning Objectives:

• Students will be able to use the concept of half-life to calculate the amount of time passed, material remaining, or activity of a sample undergoing radioactive decay.

Did you know? Radioactive dating has been essential in helping scientists discover evolutionary relationships! Did organism A exist before organism B? Did that mean that organism B evolved legs, or did organism A lose them?

Please work through the following review problems:

p. 296 #1-9

Class of: 09-Mar-2016.

Today we covered Section 10.2: Radioactivity and the Nucleus (p. 280) and Section 10.3: Radioactive Decay (p. 284).

Learning Objectives:

• Students will be able to describe the structure of the nucleus based on the Rutherford experiment.
• Students will be able to change a nucleus based on the type of radioactive decay it undergoes: alpha, beta, or gamma.

When radioactive elements were first discovered, people thought it was great that they were releasing “energy.” They didn’t realize that the energy came from deadly radioactivity, and so used elements like radon in all sorts of things, such as: foods, chewing gum, and health tonics. One man drank about 1,400 tonics before his jaw… fell off! Ouch.

Please work through the following review problems:

p. 283 #1-14

p. 289 #1-19

Class of: 07-Mar-2016.

Today we started Unit C: Radioactivity. We began with Chapter 10: Radioactivity and the Atom and covered Section 10.1: Radioactivity and its History (p. 275).

Learning Objectives:

• Students will be able to explain the role of cathode rays and X-rays in the discovery of radioactivity, and place those rays on the electromagnetic spectrum.

As an interesting factoid, all of the flags planted on the moon from the Apollo missions are still standing today. However, because of the radiation from the sun they have turned completely white! This is because the radiation breaks the covalent bonds holding together the coloured pigment molecules. Talk about a sunburn!

For the test tomorrow, 08-Mar-2016, please make sure you know the following:

• Metalloids vs metals vs non-metals, parts of the atom, chemical families, and Bohr diagrams.
• Pure substances vs. mixtures, pH and acid/base indicators.
• Naming/writing formulas of molecular and ionic compounds.
• Predicting reaction products and balancing.
• Reaction rate, Kinetetic Molecular Theory, and Collision Theory.

Please work through the following review problems:

p. 279 #1-13