40 terms

Chapter 9 review - elements, compounds, and mixtures

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A _______ has a definite ratio of components
Compound
The ability of one substance to dissolve in another substance is the _______ of the solute.
Solubility
A ______ can be separated by filtration
Suspension
An _______ is a pure substance that can't be broken down into simpler substances by chemical means
Element
A ______is an element that is brittle and dull
Nonmetal
The ______ is the substance that dissolves to form a solution
Solute
What increases the solubility of a gas in a liquid
Decreasing the temperature of the liquid
Chicken noodle soup is an example of a
Mixture
A solution that contains a large amount of solute is
Concentrated
An example of a substance that can be separated into simpler substances only by chemical means is
Water
Neon gas contain only
One kind of atom
Which classification of matter are components chemically combined
Compound
Two or more substances not chemically combined
Mixtures
Salt and water, soil and water, and sugar and water are all
Mixtures - because all 3 can be separated back out
Ability of a substance to burn
Flammability (chemical property)
Relationship between mass and volume
Density (physical property)
Characteristics that can be observed or measured
(Color, state, hardness)
Physical property
Property of matter that describes a substances ability to change into new matter that has different properties
Chemical property
Made up of only one type of particle
Pure substance
Physical properties of elements include
Malleable, ductile, boiling point, melting point, color, hardness, texture, and density
Chemical properties of elements include
Reactivity with acid or oxygen, flammability
How can elements be identified
By it's unique set of properties...these include physical and chemical properties
How are elements classified
Metals, nonmetals, metalloids
How are compounds different for mixtures
Compounds are 2 or more substances chemically combined
Mixtures are 2 or more substances NOT chemically combined
How can sugar cubes be dissolved more quickly in water
Crushing, mixing, heating
Explain how elements make up compounds
When 2 or more elements chemically combine in a specific ratio according to their masses
Describe the propertied of compounds
They have their own properties different from the elements that make them up
How can a compound be broken down into its elements
Through chemical changes....applying heat or an electric current
Examples of Common compounds
Water (H2O), salt (NaCl)
3 properties of mixtures
No chemical change
Can be separated by physical methods
No specific ratios of components
4 methods of separating the parts of a mixture
Distillation
Magnets
Centrifuge
Evaporation
When you separate a mixture based on the boiling points of the components
Distillation
Method of separating a metal for a nonmetal
Magnet
When you seperate a mixture based on the densities of the components
Centrifuge
When you evaporate a substance to get another substance
Evaporation
A mixture in which the particles are spread out and do not settle
Colloid (milk)
How can the particles of a suspension be seperated
Filtering
A mixture in which the particles are evenly spread out and it appears to be one substance
Solution
A solution in which the particles are heavy and eventually settle out
Suspension (snow globe)
How does the solubility of gases change with temperature
The solubility of the gas decreases as the temperature increases