Chapter 1 And Stoichiometry Flashcards
Daltons atomic theory
- Elements are composed of indestructible atoms
- All atoms of an element are identical
- Compounds are formed from elements
- Chemical reactions are rearrangements of atoms
Coloumbs law
Like charges repel, unlike attract
Strong force
Short range interaction that occur between objects made of quarks
Weak force
Short range interaction that involves elementary particles
scientific theory
- The best available info of the data
- falsifiable
- explains how/why
- makes testable predictions
- needs evidence.
vander waals radius
1/2 the distance between the atoms at potential minimum
greek theory
- Atomos(not to be cut)
- constant in motion
- elements: earth, fire, air, water
- iron was spikey
- atom is mostly empty.
JJ thomson
- Cathode ray tube
- discovered electron
- plum pudding model
- particularly were identical regardless of cathode.
Rutheford
- gold foil experiment
- planetary model
- discovered nucleus
law vs theory
Theory explains the underlying cause of a range of phenomena.
thermal energy
Average kinetic energy of atoms
alpha particle
Has two protons and two neutrons
Nucleus of He
Construct a scientific explanation
Claim: what
Evidence: why
Reasoning: how.
isotope
Same # of protons diff # of neutrons
electromagnetic
Attraction between objects w electric charge
Stronger
electromagnetic radiation
spectrum
daltons atom
Balls w hooks
Types of energy
kinetic and potential
kinetic energy
Energy of motion
1/2xMV^2
What is the most stable position?
the potential energy minimum because the electromagnetic repulsion and attraction are equal
effective nuclear charge
protons minus core electrons
potential energy
Energy associated w objects(needs 2)
Stored energy
kinetic energy …… as two atoms approach because….
increases
velocity goes up
coulombs law
electrostatic static between charged particles
