Yes YES!! Thank you for these. I'm such a bad notetaker :/ will definitely be looking forward to these
nuaru 13. 2011
Atoms and Molecules
outer must electrons
· Valence numbero how many bonds can an atom
bonds - need at least atoms
cavaleut catons share electrons
-'non polar covalent - they share - Hydungun (He er'H-H)
Sume charge on buta
. polak covalent band - atoms shure e unequally
Don't forget about the age old question of What does linguistics study?
Hal it H-41 3L
Shared é spends mare
time around Cl
Cl is niare electronegutive
- Ionic bond - leleutrostatic) formsketyrees ions, no Sharing Don't forget about the age old question of What is the role of gravity as a prime mover?
•jon - a charged atene 'cation - positively charged wton 'anics - bregutively charged atom If you want to learn more check out How does exhaustion lead to death?
Na ll protons
17 protons -toe
1 Chapter 3 Atoms and Molecules_peyz If you want to learn more check out What do correlations show?
TH pratium leurysky) iH Deatekivans PH tritium 12 C Carbon - 12 13 C Carbon 13 it C Carbon-14 We also discuss several other topics like What economics is all about?
r adioactive * hallo life-suse years
Carbon-Dating ___6.12;6. 14 constant ratio in atmosphere in living organisms Don't forget about the age old question of What does developmental psychology study?
- Plants get it from Coz
Animals - get it from food (releases Cos)
· Death no more carbon enters
6-12 - does not deny
Se ratie changes Tracers - detected a
“diagnose diseases Electrons 6-) - to weight
determine reactivity of an atom orbit the nucleus!
- Shell / - ze
Shell 2 5 8é - Shell 3 = be
- shell must always
fall in order 1,2,3
like to be mis pairs e differ is energy level - mare e from Shell I to shell 2 = must add energy
mave e train shell 2 to shell l = energy must be released
orbitals - position of en
Larbital halds max af de
I Shell a
January 13, 2016
| Chapter 2 - Atoms and Molecules
Elements - 92 naturally occurring - rest are made in Jab
· Pure ferm - cannot be broken down Helm N - most important for living things larkpo present is small amounts (trace elements)
Molecules / compounds - atoms BOND
-- Nalsodium) -pure-forme - explosive
-Cl lablarine)-poison gas
- NaCl - table salt Trace elements
- small amount ex ijodine Atom - smallest unitat element
- subatomia particles
Protons (+)-in nucleus
-lamu (dacten) Electrons (-) - nat ins nucleus -orbit
alltoo small to measure)
Neutrons - neutral -in nucleus - - lamu
I Atomic number = # of protons in an atom
it pratium leveryday) 2. In a neutral atom - # pratens = #clectrons 3. Atomic weight (muss)
La #prótons + # neutrons
He -2 pretons - @electronic2 neutrons Co Na -12 neutrons - 11 protons - Helectrons 4._ Isotopes - different stoms_sf the sumse element
a. # of neutron's varies (wary atomic weight) k stable or unstable (radioactive) !
Radioactive - undergo 'olecay" limit radiation) d. "half-life" - time requires for bult of the atoms in the sample to