Which of the following is an example of physical change?
a. Mixing baking soda and vinegar together, and this causes bubbles and foam.
b. A glass cup shatters on the ground.
c. Lighting a piece of paper on fire
d. Baking a birthday cake
100
Give an example of an element:
This was easy ... Oxygen, Sodium, Chloride, Hydrogen ...
100
Write the formula for density.
D = M/V
100
What do we call the diagrams that show the valence electrons around an atom’s symbol ?
Lewis Dot Structures or Electron Dot Structures
100
How many PROTONS does GOLD have ?
79 Protons
200
Which of the following is an example of chemical change?
a. Filling up a balloon with hot air.
b. Taking a glass of water and freezing it by placing it in the freezer.
c. A plant collecting sunlight and turning it into food.
d. Your dog ripping up your homework.
200
How is an element different from a compound?
a. An element can not be broken down into a smaller, pure substance.
b. A compound is made up of more than one element.
c. Two elements can make a compound.
d. All of the above is correct.
200
Write a unit and symbol for mass and a unit and symbol for volume.
Mass = grams (g) or kilograms (kg)
Volume = cubic centimeters (cm3) or Liters (L)
200
What subatomic particle has a mass of nearly 0 and a charge of -1 ?
ELECTRONS
200
How many VALENCE ELECTRONS does RUBIDIUM have?
1 Valence Electron
300
Which change can be easily be reversed?
a. Chemical Change
b. Physical Change
c. Both a physical and chemical change
d. Neither a physical or chemical change
300
How is a mixture different from a compound?
a. Particles of a mixture are combined chemically.
b. components of a mixture can only be separated chemically.
c. Composition of a mixture may be constant.
d. Components of a mixture can be separated by physical means.
300
If an object has a mass of 15 grams and a volume of 3 cubic centimeters, what is its desity?
INCLUDE THE CORRECT UNITS.
5 g/cm3
300
What subatomic particle has a mass of 1 and a charge of +1 ?
PROTONS
300
How many NEUTRONS does Phosphorus-31 have?
16 NEUTRONS
400
When a new substance is formed with different properties than the original substance it is called a
a. Chemical change
b. Physical change
c. Freezing
d. Boiling
400
Give an example of a compound:
Anything that is two elements chemically bound ... like table salt (NaCl), water (H2O), Magnesium Flouride (MgF2) ...
400
What is the mass of 3 liters of a liquid that has a density of 4 grams/liter?
12 grams
400
Name the subatomic particles that are found in the nucleus.
Protons and Neutrons
400
DOUBLE JEOPARDY:: What is the difference between Carbon-12 and Carbon-14 ?
C-12 has 6 Neutrons. C-14 has 8 Neutrons. They are isotopes of Carbon.
500
Which is an example of chemical change?
a. Water freezes
b. Wood is cut
c. Bread is baked
d. Wire is bent
500
Give an example of a mixture, and state what type of mixture it is:
Heterogenous - Not uniform ... gravel, concrete, salt and sand, oil and water, etc
Homogenous - Uniform ... Kool-Aid, salt water, yogurt, milk, butter, steel, brass
500
DOUBLE JEOPARDY :: What is the volume of an object that weighs 20 kilograms and has a density of 10 kilograms/cubic centimeters?
2 cm3
500
DOUBLE JEOPARDY :: What do we call the outermost electrons and how many does every atom want?
VALENCE ELECTRONS and EIGHT (8)
500
TRIPLE JEOPARDY :: What must be the OXIDATION NUMBER of CHROMIUM in one molecule of CrN? (Chromium Nitride)
+3
Since Nitrogen is -3, and there is only ONE Nitrogen in the formula, Cr must be +3 to balance it out.