Why you pass the test questions.
What is the grid that organizes elements into periods called?
What is the Periodic Table
A separation technique that results in the formation of pure solid particles from a solution is called
What is Crystallization.
This states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass.
What is The Law of Definite Proportions.
A homogeneous mixture is also known as a
What is a Solution
A technique that separates the components of a mixture.
What is Chromatography.
This states that mass is neither created nor destroyed in a chemical reaction, it is conserved.
What is the Law of Conservation of mass.
What is the process of a solid changing directly to a gas, which can be used to separate mixtures of solids when one sublimates and the other does not called
What is Sublimation
The ratio of the mass of each element to the total mass of the compound is
What is Percent by Mass
This states that different masses of one element combine with the same relative mass of another element to form different compounds.
What is The Law of Multiple Proportions.
What is the ratio of oxygen to carbon in carbon dioxide (CO2)?
What is Oxygen 2:1 to Carbon.
When one substance turns into another, what kind of change has taken place?
What is a Chemical Reaction
What technique would you use to separate a mixture of two substances with different boiling points?
What is distillation.
What is a period on the periodic table of the elements?
What are the Horizontal Rows
What is a combination of two or more pure substances in which each pure substance retains its individual chemical properties called
What is a mixture.
An element is a substance that cannot be
What is divided into simpler substances by physical
or chemical means.
What is an Intensive Property
Compound H2O
Mass of Oxygen- 16 g
Mass of Hydrogen- 2 g
What is the Mass O/Mass H-
What is the mass of H2O2?
What is 18 g. Then what is 34 g.
In a chemical reaction, the Reactants form what
The mass of the reactants are what to this.
What are the Products. The mass of both are equal.
Two or more elements chemically joined form what?
What is a compound
What are the vertical columns in the periodic table called?
What are groups or families.
Give two examples of physical properties of a substance and two examples of a chemical property of a substance. Does not have to be the same substance of reach example.
EXAMPLES:Chemical- Rust on metal. Copper Turning green. Physical- Boiling Point, Freezing Point, Melting Point, Density.
1. color
2. tendency to rust
3. boiling point
4. density
5. ability to burn
1. physical property, intensive property
2. chemical property
3. physical property, intensive property
4. physical property, intensive property
5. chemical property
Compare and Contrast a Chemical Property and a Physical Property.
The ability of a substance to COMBINE with or change into one or more other substances is called a Chemical Property. Whereas, a Physical Property is a characteristic that can be observed or measured without changing the sample’s composition.
Match each term together from column A to column B.
Column A Columns B
alloy gold
element methane
gas steam
vapor sterling silver
alloy-sterling silver
element-gold
gas-methane
vapor-steam
Identify each mixture as homogeneous or heterogeneous.
1. stainless steel
2. granite
3. air
4. blood
5. hand lotion
6. oil and water
1. homogeneous
2. heterogeneous
3. homogeneous
4. heterogeneous
5. homogeneous
6. heterogeneous