List 3 chemical properties of matter
COMBUSTIBILITY, REACTIVITY, FLAMMABILITY
What unit of density would you use for a solid?
The Law of Conservation of Mass states that the mass of the reactants
must be greater than the mass of the products
must be less than the mass of the products
must be equal to the mass of the products
will change if the temperature changes
75ml= __0.075__ l 480 cm=___4.8___m 6.3 cm=____630__mm
List the 3 states of matter
SOLID, LIQUID, GAS
State the Law of Conservation of Mass.
MATTER IS NEITHER CREATED, NOR DESTROYED – IT CHANGES FORMS (REACTANTS=PRODUCTS IN A CHEMICAL REACTION)
How is the periodic table arranged (from left to right)?
ACCORDING TO ATOMIC NUMBER (OR NUMBER OF PROTONS)
What is a mixture? Explain in a complete sentence.
A MIXTURE IS A PHYSICALLY COMBINED COMBINATION OF MULTIPLE DIFFERENT TYPES OF MATTER (ELEMENTS, COMPOUNDS, OTHER MIXTURES)
What is the difference between a homogeneous and heterogeneous mixture?
A HOMOGENEOUS MIXTURE LOOKS UNIFORM THROUGHOUT, A HETEROGENEOUS MIXTURE LOOKS DIFFERENT (HOMOGENEOUS MIXTURE = COFFEE, TEA, TOOTHPASTE, MAYONAISE; HETEROGENEOUS MIXTURE= SALAD, TRAIL MIX, CHOCOLATE CHIP COOKIES)
Which is larger, an atom or a molecule? Explain your answer.
A MOLECULE IS LARGER BECAUSE IT IS COMPOSED OF MULTIPLE ATOMS
What is the difference between a molecule and a compound?
A MOLECULE IS THE SMALLEST UNIT OF A COMPOUND – JUST AS AN ATOM IS THE SMALLEST UNIT OF AN ELEMENT
Station #12 Find the Density
L= 15cm W=2cm H=1cm Mass= 150g
Initial Water level= 20 ml
Final water level= 22ml
Mass of Rock= 14g
What units are used to measure mass? GRAMS (g)
What units are used to measure liquids? LITERS (l)
What units are used to measure distance? METERS (m)
What are signs of a chemical change? Explain in a complete sentence.
THE SIGNS OF A CHEMICAL CHANGE ARE AS FOLLOWS: A CHANGE IN COLOR, CHANGE IN ODOR/SMELL, CHANGE IN TEMPERATURE, PRODUCTION OF LIGHT, OR FIZZING/FOAMING.
Draw and label an atom with all the particles
How do elements join to form compounds?
in a ratio of 1 to 8
in a specific mass ratio
as the scientist plans it
Which of these phrases describes the results of a chemical change?
charred wood, ash, and smoke
reactivity with lithium
a bent metal bar
List an example of a physical and a chemical change.
PHYSICAL CHANGE = BROKEN GLASS, RIPPED PAPER
CHEMICAL CHANGE = RUST ON A CAR, DIGESTING FOOD, BAKING A CAKE
What’s the difference between mass and weight?
MASS IS THE AMOUNT OF MATTER IN AN OBJECT, AND WEIGHT IS THE AMOUNT OF GRAVITATIONAL FORCE ACTING ON AN OBJECT
List 3 characteristics of metals
SHINY, DUCTILE, GOOD CONDUCTORS OF HEAT/ELECTRICITY
Sucrose (table sugar) has 12 atoms of Carbon, 22 atoms of Hydrogen, and 11 atoms of Oxygen. Write the formula for sucrose.
What is a group/family?
A GROUP/FAMILY IS A SET OF ELEMENTS FOUND IN THE SAME COLUMN (VERTICAL/UP AND DOWN) ON THE PERIODIC TABLE – WHICH ALSO SHARE SIMILAR PHYSICAL AND CHEMICAL PROPERTIES AND CHARACTERISTICS
How do particles move in each state of matter? (gas/liquid/solid)
PARTICLES MOVE FREELY/RAPIDLY, NO ORDERLY ARRANGEMENT
PARTICLES SLIDE PAST EACH OTHER (ALLOWS LIQUIDS TO BE POURED)
PARTICLES VIBRATE IN PLACE
What is a molecule?
A COMBINATION OF TWO OR MORE ATOMS (CAN BE THE SAME TYPE OF ATOM OR DIFFERENT)
Give an example of a chemical formula.
H2O, NaCl, CH4, O2, H2SO4
Create a Bohr diagram for Nitrogen (N)
If two toxic elements are combined chemically, which of the following will be true of the resulting compound?
A. The compound will be more toxic than the gases.
B. The compound will be as toxic as the gases.
C. The compound may or may not be toxic.
D. The compound will not be toxic.
Draw the conversion chart (staircase) with the units labeled.
Which of the following objects would be a good conductor of heat and electricity?
a plastic spoon
a copper coin
a wooden ruler
a styrofoam cup
A chemical change is taking place in a closed container. What will happen to the mass of the materials in this closed container?
- The mass will increase.
- The mass will decrease.
- The mass will stay the same.
- It will depend on which chemical reaction occurs.
What happens to a solid object with a density that is less than water when it is placed in water?
The object sinks about halfway into the water.
The object displaces a quantity of water greater than its volume.
The object settles to the bottom of the water.
The object floats on top of the water.
Souring milk is an example of a
What makes chemical properties so difficult to observe?
They result in changes of state.
Observing them produces new materials.
Wearing protective glasses is required.
They happen too quickly
When two or more elements join together chemically,
a compound is formed.
a mixture is formed.
a substance that is the same as the elements is formed.
the physical properties of the substances remain the same.
Which of the following is an example of a heterogeneous mixture?
chocolate chip cookies
Which of the following is NOT a reason that compounds are considered pure substances?
They are composed of only one type of particle.
The particles are made of atoms of two or more elements that are chemically combined.
Different samples of any compound have the same elements in the same proportion.
They can be separated by physical methods.
Element - A
Mixture - B