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Unit 3
trends/and other stuff
18
Chemistry
12th Grade
10/03/2010

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Term
electronegativity
Definition
When an atom is covalently bonded it's relative ability to attract a bonding pair of electrons
Term
amphoteric
Definition
Capable of acting like either an acid or a base
Term
General reactivity and oxidizing ability of the halogens
Definition
.their ozidizing ability is very strong with group 1..
.Reactivity is strong with group 7
Term
Melting point trends
Definition
.group 1A increase going up
.group 7A increase as you go down
Term
Atomic radius trends
Definition
.radius decreases as atomic number increases left to right
.increases going down
Term
ionization trends
Definition
.going up you have less electron shielding/held tightly to gether
.going left to right you have more I.E because you have a greater nuclear charge
Term
reactivity trends
Definition
.decreases going down in Group 1A
.increases going up in Group 7A
Term
Electronegativity trends
Definition
.decreases going down
.increases going left to right
Term
ionic radii trends
Definition
.increases going left to right
.decreases going down
Term
atomic number
Definition
.simply equal to the number of protons in the nucleus of the atom
Term
mass number
Definition
equal to the number of protns and neutrons in the nucleus of the atom
Term
isotopes
Definition
atoms of the same element but a different number of neutrons
Term
Wavelength and frequency of the colors of the ROYGBIV
Definition
wave length increases, frequency decreases
Term
[image]
Definition

A- The subastance is first turned into a vapor phase

B- These particles are turned into positive ions (ionization)

C- Particles are accelerated (acceleration)

D- Pariticles are deflected (deflection). The lighter the particle, the greater the defection. The lifhter particle will get thrown farter by magnetic field

E- Particles of a particular mass, which can be adjusted will be detected (detection). one particular isotope can detect

F- the body of the instrument must be maintained a t a high vacuum by a pump

Term
1st Quantum Number
Definition
.n
.energy level
.approx distance from nuleus
Term
2nd Quantum Number
Definition
. ℓ
.energ subleve
.shap of orbital
.(s,p,d,f)
Term
3rd Quantum number
Definition
.magnetic
.m ℓ
.identifies axis orientation and orgital (x,y,z)
Term
4th Quantum Number
Definition
.m ℓ
.tells direction of spin(up or down)
. up= 1/2
. down= -1/2
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