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Proctored Chem exam 1
HAHA. Gonna ace!
15
Chemistry
11/26/2011

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Term
What is the Heisenberg Uncertainty Principle? (What two things can we not know about an electron at the same time?)
Definition
Position and momentum.
Term
What is an orbital, why do we have to use it to describe electrons around the nucleus? (Page 238)
Definition
the space where there is a high probability of finding an electron.
Term
Nucleus
1s
2s 2p
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f
6s 6p 6d 6f
7s 7p 7d 7f
Definition
Term
What is an orbital, why do we have to use it to describe electrons around the nucleus? (Page 238)
Definition
the space where there is high probability of finding an electron
Term
Know the basic definition of a reversible reaction and roughly how it works. (Page 208)
Definition
when a chemical reaction changes direction. ties in with equilibrium.
Term
What is Le Chatelier’s Principle? How did Haber use it to produce ammonia? (Page 212-215)
Definition
1. if stress is applied to a system at equilibirm, the system shifts direction to relieve the stress. 2. Haber would use equilibrium to make amonia, take the amonia out, then the reaction would make more.
Term
What are the 3 ways we discussed in class to affect the rate of a reaction? (Page 216-217) How does a Catalyst work?
Definition
1. increase temprature, increase concentration, add a catylist.
2. a catylist decreases the activation energy which increases the rate of equilibrium.
Term
two substances combine to form a compound. what is this called?
Definition
synthisis.
Term
what do you call it when a compound breaks down into two or more simpler substances?
Definition
decomposition.
Term
What do you call it when a reaction is one in which an element takes the place of another?
Definition
single displacement
Term
what do you call a reaction when the positive ionc of two ionic compounds are interchanged.
Definition
double displacement
Term
what do you call a reaction where a substance rapidly combines with O2 to form one or more oxides? it happens in cars.
Definition
combustion.
Term
After Bohr’s Model, scientists discovered sublevels what we now call orbitals. What are the 4 orbital types? (Page 233)
Definition
s,p,d,f
Term
How many electrons can you fit in an S? In a P? In a D? in a F? How many spots do they have, and how many electrons fit in them?
Definition
2, 6, 10, 14! Because they have 1,3, 5, and 7 spots (or orbitals, think of it as it's lines within an energy level, they are sub levels! 1 has 1. 2 has 3 sub levels. etc,) respectively. and you can fir 2 electrons per spot.
Term
If I am finding 17e, and it stops at 3p with 5 electrons remaining (3p fills 6) what do I do? how do I write the answer?
Definition
3p lil 5. 3p5. because it shows how many are in there.