Show:
Matter
Physical and Chemical Changes
Mixtures and Solutions
Acids and Bases
Periodic Table
100
All matter is made up of a. compounds b. cells c. molecules d. atoms
Atoms
100
Give an example of a physical change
(answer will vary)
100
T/F: mixtures and solutions react chemically?
False. They do not react chemically
100
About where on pH scale would a lemon fall?
A 2. It is considered a strong acid
100
Which substances are elements: C, HCL, HNO3, N, or H2O?
C and N
200
The substance that contains only one kind of atom is a solution, element or compound?
element
200
Give an example of a chemical change
(answers will vary)
200
What would take longer to dissolve, a sugar cube or small granules of sugar?
A sugar cube. It would need time for the sugar to break apart.
200
What is the pH value for water?
7. It is neutral
200
Which parts of the atom move around the nucleus?
Electrons
300
T/F: Mass is best defined as the length of an object.
False. Mass is best defined as the amount of matter an object contains
300
A carrot is picked from the plant, chopped up, and then cooked and burnt. List what changes have taken place
physical, physical, chemical
300
What are two ways in which I could separate iron filings, sand and water?
I could use a strainer to catch the larger particles, and then i could evaporate the water. I could evaporate the water, then use a magnet to attract the iron filings from the sand.
300
If I was testing a substance and the red litmus paper turns blue what do I have?
A base
300
If the number of protons in Sodium is 11. The atomic number would be?
11
400
The amount of matter does not change in a chemical reaction due to the law of conservation of _____.
mass
400
T/F : a substance changes molecularly when it goes through a chemical change.
True
400
What type of solution do you have when you add so much solute that no more can dissolve?
A saturated solution
400
What is the range for a strong acid? What is the range for a strong base?
A strong acid: 0-3 A strong base: 11-14
400
If the atomic mass of Magnesium is 24 and the number of protons is 12, the number of neutrons would be?
12. (Atomic Mass- protons= neutrons) 24-12=12
500
Something that has definite volume and definite shape is a solid, liquid, or gas?
A solid
500
Water evaporates, condenses, and the freezes. Is this going through a physical or chemical change?
Physical. It is only going through phase changes
500
What is one way to increase solubility of salt in water? a. Increase the amount of water b. Chill the water c. Heat the water
Heat the water. The molecules in the water will move fast and will float farther apart. This allows for more salt to be dissolved into the water
500
In terms of pH, what would happen if I mixed Hydrochloric acid (0) with Drain cleaner (14)?
You would get 7. They would neutralize each other.
500
T/F, elements are listed in the order in which they were discovered?
False. They are in the order of their atomic number