Miscellaneous from chapter 2 Flashcards
K° (Kelvin) relationship to C° (Celcius)
K° = C° + 273.15 (C° = K° - 273.15)
(The .15 can be left off, unless you are an engineering major or have OCD.)
Formula for Density
mass (m)/Volume (V)
(Example: g/mL)
Which scientist discovered the charge of an electron with the oil drop experiment?
Robert Millikan
Which scientist used the Gold Foil experiement to postulate the structure of the atom, disproving the plum pudding model, and discovered the Proton.
Rutherford
Which scientist produced the atomic theory of matter?
Dalton
Law of multiple proportions.
If two elements A and B combine to form more than one compound, the masses of B that can combine with a given mass of A are in the ratio of small whole numbers.
Law of conservation of mass.
The total mass of materials present after a chemical reaction is the same as the total mass present before the reacton.
Law of constant composition
In a given compound, the relative numbers and kinds of atoms are constant.
Dalton’s Atomic theory
1.
Each element is composed of extremely small particles called atoms.
Dalton’s Atomic Theory
2.
All atoms of a given element are identical, but the atoms of one element are different from the atoms of all other elements.
Dalton’s Atomic Theory
3.
Atoms of one element cannot be changed into atoms of a different element by chemical reactions; atoms are neither created nor destroyed in chemical reactions.
Dalton’s Atomic theory
4.
Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms.
What is the volume of 1 g of water at 4 C°?
1 mL
Average width of an atom’s nucleus
10-4 Å (angstroms)
1 Å (angstrom) = ? meters
10-10 m (meters)
