Study Guide Flashcards
S.I. unit of speed
m/s
S.I. unit of length/distance
meter, m
S.I unit of time
second, s
S.I unit of temperature
kelvin, K
S.I. unit for amount of substance
mole, mol
S.I. unit of electric current
ampere, A
What did Millikian’s drop oil experiment establish?
The charge on an electron
What did J.J. Thomson discover?
What an electron even is
S.I. unit for acceleration
Δv/Δt, (m/s)/s = m/s^2
What is Rutherford known for?
The nucleus inside of an atom
If the distance between two charged particles is halved, the electrostatic force between them will?
Quadruple,
S.I unit for velocity
mph, m/s, Δx/Δt
S.I. unit for force
F= mass x acceleration, kg x m/s^2
Coulomb’s law
F= 1/4πε0 x q1q2/ d2
Element
Pure substance that always consist of a single type of atom
Molecular Compound
when divided, the smallest pieces are still the same type of substance with the same elements ex, H2O
Mixture
Composed of more than one pure substance ex, air, saltwater, wood, humans
Ionic Compounds
Compounds made up of ions that form charged particles when an atom (or group of atoms) gains or loses electrons ex, NaCl
Physical Change
The composition stays the sane, just appears different. ex, freezing, boiling, melting
Chemical Change
The composition will change, change of materials into another ex, baking a cake, iron rusting
Homogeneous Mixture
Same proportions of its mixture throughout. ex, water, wine
Heterogeneous Mixture
Visually distinguishable components. ex, rocky road ice cream, salad
Law of Conservation of Mass (Lavoisier)
The mass of something before a chemical reaction will be the same after. Mass will not change
Law of Definite Composition (Proust)
A chemical compound will always contains its component elements in fixed ratio
Law of Multiple Proportions
When two chemical elements combine to form more than one compound, the masses will always end of being a small whole number ratio
Isotope
Atoms of an element that have the same number of protons, but different numbers of neutrons
