chemistry
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Livres bien-aimés chemistry
Michael L. Bishop, Edward P. Fody, Carleen Van Siclen • ISBN 9781284238860
Karen C. Timberlake • ISBN 9780134421353
Carl A. Burtis, David E. Bruns • ISBN 9781455741656
David Shubert, PhD, John Leyba, PhD, Sharon Niemann, DNAP, CRNA • ISBN 9780826107831
Julia Burdge • ISBN 9781260565850
Dernières notes et résumés chemistry
metals - Answer are good conductors of heat and electricity 
patterns in the properties of elements - Answer Each scientist accredited for helping to 
develop the periodic table had a different way of arranging the elements but they all 
used______________________________ as a basis for their organizational method 
core - Answer __________ electrons experience a greater force of attraction to the nucleus 
B - Answer Which of the following elements would form an ion with a +3 charge? 
Options: Na...
Sig fig addition rule - Answer The least accurate number place 
Sig Fig Multiplication/Division Rule - Answer least number of sig figs 
net ionic equation - Answer an equation for a reaction in solution showing only those 
particles that are directly involved in the chemical change 
oxidation number - Answer Positive or negative number that indicates how many 
electrons an atom has gained, lost, or shared to become stable 
micro - Answer 10^-6 
nano - Answer 10^-9 
% yield - Answer actual yield/...
Matter - Answer Anything that has mass and takes up space 
Mass - Answer the amount of matter in an object 
Volume - Answer The amount of space an object takes up 
physical property - Answer A characteristic of a pure substance that can be observed 
without changing it into another substance 
chemical property - Answer A characteristic of a pure substance that describes its ability 
to change into different substances 
melting point - Answer the temperature at which a substance changes from a so...
John Newlands - Answer -arranged elements by increasing atomic mass 
-noticed the repetition of properties every eighth element 
-created the law of octaves 
Mendeleev - Answer -demonstrated a connection between atomic mass and elemental 
properties 
-arranged the elements in order of increasing atomic mass 
-predicted the existence and properties of undiscovered elements 
Moseley - Answer -Discovered that atoms contain a unique number of protons called the 
atomic number 
-Arranged elements in ...
A burning splint will burn more vigorously in pure oxygen than in air because____. 
A) oxygen is a reactant in combustion and concentration of oxygen is higher in pure oxygen than 
is in air 
B) oxygen is a catalyst for combustion 
C) oxygen is a product of combustion 
D) nitrogen is a product of combustion and the system reaches equilibrium at a lower 
temperature 
E) nitrogen is a reactant in combustion and its low concentration in pure oxygen catalyzes the 
combustion - Answer A) oxygen is a ...
Atomic model - Answer Representation of an atom showing its nucleus and orbiting 
electrons. 
Proton - Answer Positively charge subatomic particle found in the nucleus. 
Neutron - Answer neutrally subatomic particle found in the nucleus. 
electron - Answer negatively charged subatomic paticle found in orbit around the nucleus 
subatomic - Answer within the atom 
pure substance - Answer 1 consistent particle (1 formula throughout). 
Mixture - Answer 
Homeogenous mixtures - Answer same consistency...
Found in the nucleus of the atom - Answer protons and neutrons 
Found in the rings outside of the nucleus - Answer electrons 
How many electrons fit in the first ring? - Answer 2 
Only 2 electrons fit in the 1st ring. How many fit in all the other rings? - Answer 8 
What do you call the electrons in the outermost ring? - Answer valence electrons 
These are the rows (left - right) on the periodic table - Answer periods 
These are the columns (up and down) on the periodic table - Answer groUPs 
Va...
physical change - Answer any change that changes the form or appearance of a substance 
but does not change it into another substance 
chemical change - Answer when the atoms rearrange to form new substances 
Reactants - Answer substances that undergo the chemical changes 
Products - Answer the new substance that forms 
Precipitate - Answer a solid that forms from liquids during a chemical reaction 
Exothermic reaction - Answer the energy released as the products form is greater than the 
energy...
Change in energy, Production of a gas, Formations of a precipitate, Color change - Answer 
Four evidences of Chemical Reactions 
Precipitate - Answer A solid that settles out of a solution as the result of physical or 
chemical changes 
Color change - Answer A physical change that shows a reaction has occurred 
Chemical equation - Answer A model of a chemical reaction that shows the chemicals 
used (reactants) and the chemicals produced (products); 
Reactants - Answer Left hand side of the equat...
Group 1 - Answer Alkali metals. 
Group 2 - Answer Alkaline earth metals 
Groups 3-12 - Answer transition metals 
metalloids - Answer Found along the 'staircase'. Have properties of both metals and 
nonmetals 
nonmetals - Answer brittle , dull, poor conductors of heat and electricity 
Proton - Answer Positively charged particle in the nucleus of an atom 
Neutron - Answer A subatomic particle that is neutral and that is found in the nucleus of 
an atom 
Electron - Answer A tiny, negatively charg...