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Mr. Allan’s Preamble for Nov. 16th

admin — Mon, 16 Nov 2009 17:48:04 +0000

Why isn’t it necessary to use prefixes such as mono, di, and tri when writing the names of ionic compounds. In other words, why can we call MgCl2 “magnesium chloride?” Why don’t we call it magnesium dichloride?

Mr. Allan’s Preamble for Oct 8 & 9

admin — Thu, 08 Oct 2009 16:07:41 +0000

In this unit we study periodic trends. Below you see a graph of the Dow Jones Industrial Average over the last six months. What trend do you oberve over the time period? Does the term “trend” suggest that the same thing happens in the stock market every day during that period?

Six Month Dow Industrial Average

Mr. Allan’s Preamble for Oct. 6 & 7

admin — Tue, 06 Oct 2009 16:13:00 +0000

Use a periodic table to determine which FOUR of these elements have chemical and physical properties which are most similar to one another. What characteristics do they share? To what group do they belong?

nitrogen oxygen chlorine sodium lead krypton

iodine magnesium bromine carbon gold fluorine

Mr. Allan’s Preamble for Sept 24 & 25

admin — Thu, 24 Sep 2009 16:26:10 +0000

Electron orbitals are essentially 3-dimensional maps showing the probability of finding an electron within a region in an energy level.

To understand probability mapping, lets think about our Principal, Mr. Waters. Lets pretend that we have attached to him a device which reports to us his position on campus every five minutes for an entire school week. We place pins in a map of campus everytime his position is reported.

At the end of a week, what areas on campus do you think would have the most pins? What areas might have few, or even none? Does the map tell us where Mr. Waters will be five minutes from now?

Mr. Allan’s Preamble for Sept 17 & 18

admin — Thu, 17 Sep 2009 16:30:41 +0000

Warm up for the benchmark on balancing nuclear equations! You will need a periodic table to complete this activity.

Mr. Allan’s Preamble for Sept 10 & 11

admin — Thu, 10 Sep 2009 15:41:25 +0000

As a warmup for today’s benchmark, complete the following table. You are encouraged to use a periodic table.

Mr. Bowman’s Preamble for Sept. 10-11

Brad — Thu, 10 Sep 2009 13:00:57 +0000

1. If an atom has a mass # of 209 and has 127 neutrons in its nucleus, what is the name of this element?

2. If another atom has 92 protons and has a mass # of 240, what is the name of the atom and how many neutrons does it have in its nucleus?

Preamble for August 31/September 1 2009

admin — Mon, 31 Aug 2009 16:53:50 +0000

ATOMIC STRUCTURE

Summarize what you know about the structure of the atom.

What are the particles present in the atom?
Where are the particles found in the atom?
What are the charges and mass of the particles?
Which region of the atom contains most of the mass?
Which region makes up most of the volume of the atom?

Preamble for August 24th, 2009

admin — Mon, 24 Aug 2009 16:50:15 +0000

Image courtesy of Wikimedia Commons user Wikid77

If the wind will not serve, take to the oars. – Latin Proverb

What does this quote mean? What significance does it have for students taking classes that they find difficult?

Dimensional Analysis and the World Record

admin — Thu, 20 Aug 2009 14:17:13 +0000

On August 16th 2009, Jamaican sprinter Usain Bolt shattered the world record in the 100 meters with a time of 9.58 seconds. He broke the record at the World Championships in Berlin, Germany.

Describe how you might go about converting this speed (100 meters in 9.58 s) to its equivalent in miles per hour.
Without doing the actual math, how fast do you think this would be in miles per hour?