Semester 1 Review

Front

What are the two variables used in a distance-time graph?

Back

Distance and time.

Front

What is the pH range of acidic solutions?

Back

0 to 6.

Front

Why does oil not dissolve in water?

Back

Because water is polar and oil is non-polar.

Front

How many Hydrogen atoms are in 4H2O?

Back

8.

Front

What type of elements border the 'stair step' or 'zigzag line' on the periodic table?

Back

Metalloids.

Front

What is the definition of a polar molecule?

Back

A molecule with a partial positive charge on one side and a partial negative charge on the other, due to unequal sharing of electrons.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What is the significance of the pH scale?

Back

It measures the acidity or alkalinity of a solution.

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals.

Front

What happens to the solubility of most solids in water as temperature increases?

Back

It generally increases.