Chemistry Semester 1 Final : Dr.Musser !!!!
Terms in this set (64)
What kind of energy is carried by objects in motion?
anything that has mass and volume is called
which state of matter is characterized by definite shape and definite volume?
which state of matter is characterized by definite volume but lack of definite shape?
which is not simply a change in state?
is density a physical or chemical property?
crushing (P or C change)
substance that cannot be separated into simpler substances by a chemical change
substance that contains two or more elements chemically combined in a fixed position
pure substances include...
elements and compounds
blend of two or more pure substances
what CAN'T be used to separate homogeneous mixtures?
which separation technique takes advantage of differences in boiling points?
an atom is the smallest part of an element that...
retains the chemical identity of that element
where are electrons normally found in an atom?
outside the nucleus
what is the approximate atomic mass of a neutron?
the atomic number of an atom is also the number of...
the mass number of an atom is...
total number of neutrons and protons
how does an element identify itself
an ion always contains
an unequal number of protons and electrons
isotopes have the same number of _________ but a different number of _________
burning wood (C or P change)
what are the 5 indications of a chemical change
1. light emitted
2. change in temperature
3. color change/rusting
4. formation of a precipitate
5. gas emitted
what is the SI base unit for mass?
liter is a unit of (mass, volume, length...?)
mL = ?
what measures liquid volume?
D (density) =
which conversion factor is used to convert grams to kilograms?
1kg/1000 g = 1
what kind of reactions release heat?
what is the unit of energy?
the amount of heat needed to raise the temperature of 1 g of something by 1°C is called...
1 calorie = ? joules
the capacity to do work =
energy possessed by objects because of their position or the arrangement of their particles is called...
kinetic energy is carried by objects that are...
the amount of heat needed to raise the temp of 1 g of WATER by 1°C is called...
what kind of energy does the sun illustrate?
E (energy) =
mcΔT (mass x specific heat x difference in temp)
what is the typical charge on the ions formed by the alkali metals?
what is the typical charge on the ions formed by the alkaline earth metals?
which are the least reactive group of elements?
monatomic anions are named with which suffix?
an ionic bond is the _________ of electrons while a covalent bond is the __________ of electrons
how is atomic mass of atoms generally expressed? (which unit)
how many atoms are in a sample of an element whose mass in grams is numerically equal to the atomic mass?
6.02 x 10^23
the number of atoms of an element equal to the number of atoms in exactly 12.0 g of carbon-12 is called what?
6.02 x 10^23
what units is molar mass typically expressed?
what kind of measurements are reproducible?
what kind of measurements are very close to the correct value?
where are neutrons located in an atom?
where are protons located in an atom?
mass # =
protons + neutrons
filtration is used on...
heterogeneous mixtures of solids with liquids
crystallizations is used on....
homogeneous mixtures of solids dissolved in liquids
how reactive are halogens?
what do halogens consist of?
how reactive are the noble gases?
how reactive are the alkali metals?
how reactive are the alkaline earth metals?
which groups/families of elements are NOT found as elements in nature?
alkaline earth metals and alkali metals
what kind of ratio is the empirical formula?
a mole ratio