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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 [...]

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