The Periodic Table
Conservation of Mass by the numbers
Evidence of Reaction
Lab Equipment
Reading Graphs
100
Elements in one of these have similar chemical properties.
What is a group (or family)?
100
This principle states that if no matter is added or taken away, or in other words, in a "closed system," the mass does not change.
What is Conservation of Mass?
100
Compare the product of a chemical reaction to the reactants.
What is a substance that was not present before, having different properties?
100
We use a scale to find this, although the correct way is to use a balance.
What is mass?
100
The independent variable in this graph
What is "days of the week"?
200
Elements in this group are unreactive gases.
What are the noble gases?
200
Based on the principle of Conservation of Mass, if the mass of the system increases, we know this.
What is matter must have been added?
200
Bubbles forming in a reaction mixture than is not being heated.
What is evidence of a chemical reaction?
200
We measure it with this device
What is volume?
200
Number of deliveries on Tuesday
What is 119 or 120?
300
Elements in a period have the same number of these.
What are electron shells (or electron energy levels)?
300
If 30 g of metal is heated in air, and the final mass is 35 g, this amount of oxygen must have combined with the metal.
What is 5 g?
300
A color change.
What is evidence of a chemical reaction?
300
The volume of colored water in this graduated cylinder, including one estimated digit
What is anything from 25.0 to 25.3?
300
In this year, the best fit for Local Index reached 40.
What was 1910?
400
This group contains the most highly reactive metals.
What are the alkali metals (Group1)?
400
If the masses of water and Alka-Seltzer combined are 100 g, and when they react bubbles of gas escape leaving 98 g of solution after the reaction, this is the mass of gas that escaped.
What is 2 g?
400
A precipitate forming from solution.
What is evidence of reaction?
400
Name of this item of lab equipment.
What is a beaker?
400
This month showed the greatest growth.
What is March?
500
This group contains the most highly reactive nonmetals.
What are the halogens (Group 17)?
500
1 g of water is placed in a 20 g glass tube, which is then sealed shut. The tube is heated until the water all evaporates. This is the mass of the tube after heating.
What is 21 g?
500
Bubbles forming in a liquid that is being heated at its boiling point.
What is not evidence of a reaction (just boiling)?
500
This is what we know when the pans of a balance are level
What is the masses on both sides are equal?
500
Growth was 24 in this month.
What is September?