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Chem MidTerm
10/9/12
Question | Answer |
---|---|
4 Steps of Scientific Method | observations testing hypotheses developing theories scientific laws |
Chemistry | study of the composition of matter and the changes that matter undergoes |
Organic or inorganic | has to have carbon to be organic |
Law of conservation of mass | in any physcal or chemical mass is never created |
3 states of matter | solid- definite shape and volume gas-takes both shape and volume of its container liquid-indefinite shape flow yet fixed volume |
several indications of chemical reaction | transfer of energy color |
Accuracy | close to the right answer |
Precision | many times you get the same thing over and over again |
atomic number | number of protons in the nucleus of an atom of an element |
mass number | total number of protons and neutrons in the nucleus of an atom |
atomic mass | weight average of the masses of the isotopes of an element |
isotope | atoms of the same element that have the same atomic number but different atomic masses due to a different number of neutrons |
democtritis | name atom |
dalton | atomic theo |
rutherford | nucleus |
millikan | electric charger |
chadwick | neutron |
thomson | electron |
bohr | energy level |
atomic mass units are based on the------ One amu is equal to ------- | Carbon + 1/2 of Carbon 12 atom |
modern model of the atom | mostly empty space |
what is quantum | amount of energy need to mannel electron from one energy level to another |
Describe each quantum number with word, symbol | Energy level (n) 1-7 Sub Level (l) orbital (m) Spin + or -1/2 |
how many s,p,d,and f orbital are there | s=1 p=3 d=5 f=7 |
How many electrons may be in each energy level | 1=2 2=8 3=18 4=32 5=50 6=72 7=98 |
different types of chemistry | physical-area that deals with the mechanism rate and energy transfer analytical chemistry-focuses on the composition of matter biochemistry-processes that takes place in living organisms inorganic- dont contain carbon organic-contain carbon |