Fizzing and foaming
Change in color
Change in smell
Produces a gas
Produces a sound or flash of light
100
A compound is made of hydrogen, oxygen and carbon. What types of elements are found in this compound?
All nonmetals
200
What 2 physical properties are needed to calculate density?
Mass and Volume
200
What is the most abundant element on Earth?
a. Hydrogen
b. Nickel
c. Oxygen
d. Sulfur
Hydrogen
200
Which of these is a compound?
a. graphite
b. iron
c. calcium
d. vinegar
Vinegar
200
Which of these changes was caused by a chemical reaction?
a. Clothes are washed and folded.
b. An apple has been cut into pieces.
c. A picture frame is broken.
d. A container of milk smells sour.
D. A container of milk smells sour.
200
What are properties of metals?
Conductors
Luster (shiny)
Solid (except for mercury)
Malleable
Ductile (made into wire)
300
Calculate the density of a substance that has a mass of 25 g and a volume of 5 mL.
5 g/mL
300
Define an element.
A pure substance represented by a chemical symbol.
300
Which of the following is made of two different types of atoms?
a. Cs
b.Co
c. CO
d. Cu
c. CO is a compound made of carbon and oxygen
300
What kind of change is happening when food is being digested?
Chemical Change!
300
What are characteristics of nonmetals?
Don't conduct
Brittle
Many are gas
Not ductile or malleable
400
What is the density of an object that volume of 8 cm3 and a mass of 48 g ?
6 g/cm3
400
Which of these compounds contains a metal?
A. CO2
B. SiO2
C. HCl
D. Al2O3
D. Al2O3 Al is aluminum
400
Baking soda is a compound represented by the formula NaHCO3. How many different elements are in baking soda?
4
400
What is oxidation?
When something has been exposed to oxygen and changes color, rust will form if iron is present.
400
What is my hubby's name?
Chase
500
What is the density of water?
1 g/mL or 1 g/cm3
500
K is the symbol for _________.
Potassium
500
Which of these compounds is found in air?
a. HCl
b.O2
c. C6H12O6
d. H2O
D. H2O
500
A battery uses a _______ change to create electricity.
chemical
500
When is my birthday?
December 2 !
Hint hint: I like diamonds, chocolate, puppies, and Starbucks