Flashcards in Properties and Classification of Matter Deck (40)
What do physical properties describe?
Physical appearance and composition of a substance.
What do chemical properties describe?
The reactivity of a substance.
Boiling point, melting point, malleability, and ductility are examples of what kinds of properties?
Color, state, and crystal formation are examples of what kinds of properties?
Conductivity, solubility, and magnetism are examples of what kinds of properties?
Ability to burn and flash point are examples of what kinds of properties?
Behavior in air, reaction with water, and reaction to heat are examples of what kinds of properties?
Reaction with acids and pH are examples of what kinds of properties?
What is a pure substance?
All particles are identical (elements or compounds).
What does a mixture describe?
A combination of pure substances
What is a mechanical mixture?
A heterogeneous mixture in which the different substances can be separated.
What is a suspension?
A mixture in which substances are in different states.
What is a colloid?
A mixture in which the substances cannot be easily separated.
What is a homogeneous mixture?
A mixture in which components are not visible.
Pure substances can be classified in what 2 categories?
Elements and compounds
What kinds of mixtures are suspensions and colloids?
What kinds of mixtures are solutions?
What is a chemical reaction?
A process that occurs when substance(s) react to a different substance(s).
Conductors, malleable, and ductile are properties of what elements on the periodic table?
Metals are in what state at room temperature?
Solid (except for Hg)
What are periods on the periodic table?
Rows (horizontal lines).
Remember: sentences end in a period.
What are groups/families on the periodic table?
Columns (vertical lines).
What group on the periodic table is very reactive with water?
Group 1: alkali metals
What group is reactive, but less so than the alkali metals?
Group 2: alkaline earth metals
What group is very un-reactive?
Group 18: Noble gases
What group reacts with alkali metals to form salts and is poisonous?
Group 17: Halogens
What is the first (lowest) energy level of electrons?
What is the electron capacity of the second and third energy levels?
What does the atomic number indicate?
Number of protons