Chemistry ch. 2 test 9/11/17
Solid
- definite shape and volume - particles are tightly packed
Gas
-particles are far from each other -no definite volume -no definite shape
Liquid
-particles slide past each other -definite volume -no definite shape
Letters
... are used for chemical symbols today
Vapor
the gaseous state of a substance that is generally a liquid or a solid and room temperature (water ...)
Element
the simplest form of matter that has a unique set of properties: cannot be broken down into simpler substances by chemical means
Phase
used to describe any part of a sample with uniform composition and properties
Mass
The amount of matter in a given object
Volume
The amount of space occupied by an object
How elements are joined in the compound
The chemical formula of a compound does not indicated...
Corroding iron
What action changes the identity of the substance referred
Mixtures can be separated physically, while compounds cannot
What distinguishes a substance from a mixture
Elements and compounds
What do chemical symbols and formulas represent respectively
Fracture formation
What does not indicate that a chemical change may have taken place
Matter is neither destroyed or created
What happens to matter durning a chemical reaction
Its ability to decompose into hydrogen and oxygen
What is a chemical property of water at 4 degrees C
C. Evaporation
What is an example of a physical change A. Corrosion B. Explosion C. Evaporation D. Rotting of food
A compound can only be separated into its components by chemical means `
What is the difference between a mixture and a compund
The total mass of the reactants equals the total mass of the reactants
What is true for all chemical reactions
Check the composition of the sample before and after the change
What must be done to be certain that a chemical change has taken place
There must be a change in chemical properties
What must occur for a change to be chemical reaction
Chemical
When cooking and the food darkens, what change has happened
A chemical change
When paper turns yellow- brown upon exposure to sunlight, what type of change is likely taking place
D. All of the above
Which of the following are considered physical properties of a substance A. Color and odor B. Melting point and boiling point C. Malleability and hardness D. All of the above
B. Air
Which of the following cannot be classified as a substance A. Table salt B. Air C. Nitrogen D. Gold
A. Color
Which of the following is a chemical property A. Color B. Hardness C. Freezing point D. Ability to react with oxygen
D. Soil
Which of the following is a heterogeneous mixture A. Air B. Salt water C. Steel D. Soil
C. It is composed of hydrogen and oxygen
Which of the following is not a physical property of water A. It has a boiling point of 100 degrees C B. It is a colorless liquid C. It is composed of hydrogen and oxygen D. Sugar dissolves in it
B. Heat
Which of the following is not an example of matter A. Air B. Heat C. Smoke D. Water vapor
D. Silver
Which of the following material is a sub A. Air B. Gas C. Stainless steel D. Silver
C. Oil and vinegar
Which one is a heterogeneous mixture A. Vinegar in water B. Milk C. Oil and vinegar D. Air
Gas
Which state of matter expands when heated and is easy is compres
Liquid
Which state of matter has a definite volume and takes the shape of its container
Solid
Which state of matter is characterized by having a definite shape and definite volume
Liquid
Which state of matter is characterized by having an indefinite shape but definite volume
Gas
Which state of matter takes up both the shape and volume of its container
Potassium- K
Which substance has a chemical symbol that is diverted from its Latin name
chemical reaction
a change in which one or more reactants change into one or more products; characterized by the breaking of bonds in reactants and the formation of bonds in products
Mixture
a physical blend of two or more components
Compound
a substance that contains 2 or more elements chemically combined in a fixed proportion
Heterogeneous mixture
mixture that the composition is not uniform throughout
B. Salad dressing
Not a compound? A. Baking soda B. Salad dressing C. Sucrose D. Table salt
Contains more matter
A golf ball has more mass than a tennis ball because ___
Element and compound
A substance is 2 things:
Reactant
A substance present at the start of a reaction
Product
A substance produced in a chemical reaction
Liquid or solid
A substance that forms a vapor is generally at what physical state at room temperature
Gas
A vapor is which state of matter
A. Indefinite volume
All of the flowing are physical properties of a substance in the liquid state except A. Indefinite volume B. Definite mass C. Not easily compressed D. Indefinite shape
D. Ability to rust
All of the following are physical properties of matter except... A. Mass B. Color C. Melting point D. Ability to rust
Mass
An example of an extensive property of matter is ___
Matter
Anything that has mass and volume
Substances
Compounds are ...
Stainless steel
Ex of homogeneous mixture
Solutions
Homogeneous mixtures are also known as
Sucrose
In the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water, what is the reactant
Know where the metals, nonmetals, and metalloids are on the periodic table
Know where the metals, nonmetals, and metalloids are on the periodic table
Substance and mixture
Matter is 2 things:
Capitalized
The first figure in a property written chemical symbol is always ...
Homogeneous and heterogeneous
There are 2 kinds of mixtures:
Substance
matter that has a uniform and definite composition
homogeneous mixture
mixture that that the composition is uniform throughout
