Unit 2 Section B Flashcards
Characteristic physical properties
Color Density Odor Luster Malleability Ductility
Physical properties
Properties that can be determined without altering the chemical makeup of the material
Physical changes
Melting Boiling Bending Evaporating Condensing Tearing Freezing
What happens in a physical change
The material remains the same, although it’s form appears to have changed
Chemical properties
Properties that relate to any kind of chemical change a substance undergoes, often determining the substance usefulness
What happens in a chemical change
A substance changes into one or more new substances
Indications a chemical change has taken place
Formation of a precipitate Evolution of gas/solid Change in temperature Change in color Production of light Formation of oxide
Metals
Have luster Are malleable Are ductile Conduct heat Conduct electricity Tend to lose electrons
Nonmetallic
Are dull Are brittle Do not conduct heat Do not conduct electricity Tend to gain electrons
Isotopes
Atoms with the same number of protons and different number of neutrons
Noble gasses
They are unreactive and are in the rightmost column
The total mass of an atom is determined by what
Protons and electrons
A.P.E
Atomic Number
Protons
Electrons
Pure metals have a high luster
Physical
The surfaces of some metals become dull when exposed to air
Chemical
Milk turns sour if left out in room temperature too long
Chemical
Diamonds are hard enough to be used as a coating for drill bits
Physical
Metals are typically ductile
Physical
Leavened bread dough increases in volume if it is allowed to rise before baking
Chemical
Nitrogen gas, which is a relatively non reactive element at room temperature can form nitrogen oxides at the high temperature of an operating automobile engine
Chemical
Unreactive argon gas, rather than air, is used to fill many light bulbs to prevent the metal filament wire inside the bulb from being destroyed through oxidation
Chemical
Generally, metals are better conductors of heat and electricity than are nonmetals
Physical
