Set: chem benchmark exam

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All 105 Terms

Term Definition
elements pure substances that are made up of one kind of atom that cant be broken down into simpler substances
extensive properties depend on the amount of matter and energy that you have; change
chemistry the study of composition of matter and the changes is undergoes
intensive properties depends on the type of matter, but not the amount; doesnt change
chemical properties the ability of a substance to undergo a specific chemical change
physical property what is state at room temperature
physical property what is color chem or phys
physical property what is magnetism chem or phys
physical property what is boiling point chem or phys
physical property what is melting point chem or phys
chemical property what is flammability chem or phys
chemical property what is chemical reactivity chem of phys
chemical property what is tarnishing or rusting chem of phys
chemical property what is rotting or spoiling chem or phys
chemical change in order to study a chemical property a _____ _____must take place
physical property changes in state of matter- chem or phys
physical property properties change but composition doesn't change-chem or phys
physical property reversible or irreversible-chem or phys
chemical change produces new matter with a different composition than the original matter-chem or phys
extensive property ext or int. volume
extensive property ext. or int.mass
extensive property size-ext. or int
extensive property amount of energy-extensive or intensive
homogeneous solution- homo or hetero
homogeneous uniform throughout-homo or hetero
homogeneous a single phase- homo or hetero
heterogeneous not uniform-homo or hetero
heterogeneous multiple phases(layers)-homo or hertero
matter ____ can be separated physically
accuracy how close a measurement come to the true, accepted value
precision how close a series of measurements are to one another(consistent)
% error=accepted value- experimental value/accepted value x 100 what is the %error calculation????
always zeros in the middle of the # are _______ significant
never zeros at the front of a number are ____ significant
sometimes zeros at the end of a number are _____ significant
after zeroes that the end of a number ____ the decimal point are always significant
before zeroes at the end of a number ___ the decimal place are never significant
v=lxwxh volumer calculation
decays a chemical change occurs when a piece of wood decays or split or painted or cut
atoms matter is made up of tiny particles that cannot be divided called ____
atomic number ___ ____ identifies the element and equals the number of protons
atomic mass ___ ____ equals the number of protons + neutrons
atomic mass ___ ____- atomic number= neutrons
isotopes atoms withe the same atomic number but different atomic masses
proton to neutron ratio what determines the stability of an atoms nucleus???
orbitals ___ are where electrons live
when the electron falls back from excited state to ground state when does an electron give off a burst of light?
ions ____ are when an atom that has lost or gained electrons and is no longer neutral.
ions __ are a charged particle or atom
s, p, d, f what are the four sublevels?
1 s has __ orbitals
3 p has ___ orbitals
5 d has ____ orbitals
7 f has ____ orbitals
2 ___ electrons goes into the s orbital
6 ___ electrons goes into the p orbital
10 __electrons goes into the d orbital
14 ___ electrons goes into the f orbital
how many significant figures are in 0.0098789 5
what is this number rounded to three sig figs?- 0.0355 0.0355
waht is this number rounded to two sig figs?-0.0355 0.036
what is this number rounded to one sig fig?- 0.0355 0.04
what is the standard unit for length? m
what is the standard unit for mass? kg
waht is equivalent to one cubic centimeter? 1mL
2 types of pure substances are __ and ___ elements and compounds
are compounds uniform through out? yes
are elements unifrom throuhgout? yes
can elements be separated my physical means? no
can compounds be separated by physical means? no
is homo or hetero unifrom throuhgout or both? homo
can hetero be separated by physical means? yes
can homo be separated by physical means? yes
mixtures can be separated by______ if they are evaporated physical
mixtures can be separated by______ if they are filtered physical
mixtures can be separated by______ if they are used as a magnet physical
mixtures can be separated by______ if they are decanted physical
compounds can be separated into elements
what are the basic building blocks for all matter? atoms
what is in the nucleus of an atom? protons and neutrons
what determines the mass? amount of protons and neutrons
what is the charge of a nucleus? positive
waht do all atoms of the same element have in common? atomic number
atomic number=___ protons
protons=____ atomic number
neutrons = mass- ____ atomic number
electrons(in a neutral atom)=the number ___ protons
how are elements arranged on the periodic table? atomic number
who discovered the electron? thompson
who discovered the nucleus? rutherford
who discovered that the atom was mostly empty space? rutherford
who discovered that the nucleus has a positive charge? rutherford
who discovered the modern atomic theory? dalton
who used the cathode ray tube in his experiment? thompson
who used the gold foil experiment? rutherford
what is teh 1st quantum number? main energy level
what is the second energy level? sublevel
waht is the thrid energy level? orbital
what is the fourth quantum number? electron spin
how many electrons can go into each orbital? 2
how many electrons fill the 1st main energy level? 2
how many electrons fill the 2nd and 7th main energy levels? 8
how many electrons fill the 3rd and 6th main energy levels? 18
how many electrons fill teh 4ht and 5th main energy levels? 32
what is the three types of notation for writing electron configuration? standard, noble gas, orbital

Set Information

Terms 105
Creator hayleyroderick
Created October 25, 2008
Groups None
Subject chemistry
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Most Missed Words

  1. physical property → what is melting point chem or phys - 3 misses
  2. chemical property → what is chemical reactivity chem of phys - 2 misses
  3. homogeneous → solution- homo or hetero - 2 misses
  4. sometimes → zeros at the end of a number are _____ significant - 2 misses
  5. before → zeroes at the end of a number ___ the decimal place are never significant - 2 misses
  6. extensive property → ext or int. volume - 2 misses
  7. decays → a chemical change occurs when a piece of wood decays or split or painted or cut - 2 misses