<p>EN: increases as you go in a diagonal direction from Fr to F.
Atomic radius decreases as you go across because the proton attraction increases while you are in the same energy orbital.
atomic radius increases as you go down since a new orbital is added
Electron Affinity: increases as you go across halogens are extremely electron-friendly
Isn't Cl- an exothermic and spontaneous since Cl is electron friendly? The entrophy doesn't change for either so delta H decides the spontaneity. Mg is not electron friendly and thus non-spontaneous.</p>
<p>para: an atom has one unpaired electron.results in a weak attraction when put into a magnetic field
dia: an atom has a paired electron. results in a weak repulsion when put into a magnetic field.
Explain the photon effect and what happens as you change the frequency and intensity of light shining on the metal</p>
<p>nvm .</p>
<p>Explain the photon effect and what happens as you change the frequency and intensity of light shining on the metal</p>
<p>ok different question. what happens to the conductivity of a semi-conductor if the temperature is increased?</p>
<p>care to explain?? I can't find the answer... i'll just guess:</p>
<p>Photon effect is when a light knocks out an electron from a metal, or jump it up to a higher energy level. As the light gets more intese, the electrons jump to a higher energy level. I dunno what frequency does. GAh.. you give the hardest questions</p>
<p>you're right about the photon effect. a photon knocks out an electron.
The intensity of the light doesn't matter since E=hv. So the energy increases if the frequency increases. So if the frequency increases the photon effect becomes stronger. Also there is a certain frequency for metals when the photon effect will occur. If the frequency is too low the photon can't knock out the electron regardless of intensity because its energy level is too low.</p>
<p>As the temp increases, the conductivity of the semi conductor increases also because its electrons are more energetic due to the energy given by the heat. Boy I suck at wording. If you cool the semi conductor, the conductivity decreases because the electrons become tightly held by its atom and thus cannot conduct as much.</p>
<p>imiracle. to be precise, dia means you have all the subshells filled. so not a single unpaired electron. i do not know what you mean by weak attraction or weak repulsion. but simply put, a magnetic field will have a stronger effect/force on a paramagnetic atom than a diamagnetic atom. </p>
<p>explain the ionization energy decrease when going from nitrogen to oxygen and beryllium to boron.</p>
<p>it's because the atomic radius increases if you go right to left and thus the attraction force is weaker, so the ionization energy decreases. </p>
<p>What are some exceptions to the octet rule? 6 valence and 10 and 12 electron cases</p>
<p>Uh... N and B both have more protons than Be and O, so the pull on their electrons is much stronger, resulting in a higher ionization energy.</p>
<p>B F 3</p>
<p>S F 4</p>
<p>S F 6</p>
<p>yeah BF3 SF6 XeF4 XeF6 etc.
what's an alkane, alkyne, alkene?
response to below. yeah that's right.</p>
<p>S can have more than eight becuase it has the d subshell that is available.</p>
<p>They are all hydrocarbons which produce C O 2 and H 2 O when burned in air.</p>
<p>---ane has a single bond, ---ene has a double bond, and ---yne has a triple bond.</p>
<p>Formulas:</p>
<p>ane C(n) H(2n+2)</p>
<p>ene C(n) H(2n)</p>
<p>yne C(n) H(2n-2)</p>
<p>Prefixes:</p>
<p>Meth
Eth
Prop
But
Pent
Hex
Hept
Oct
Non
Dec</p>
<p>But everyone knew these already...</p>
<p>Question: Name the 8 organic functional groups.</p>
<p>ketones
aldyhydes
organic base(amine)
organic acid
alcohols
I forgot the others what are they?</p>
<p>Alcohols
Ethers
Carboxylic acids
Esters
Aldehydes
Ketones
Amine
Amide</p>
<p>Classic Question: The addition of a catalyst in a chemical reation will...</p>
<p>it depends on the catalyst if you add some type of catalyst it will slow down the reaction while the other type will hasten the reaction</p>
<p>esters, ether, dbl bond?</p>
<p>Yes, but catalysts always provide an alternate pathway to lower the activation energy.</p>
<p>If both Delta H and Delta S are negative, what must the temperature be for a reaction to be spontaneous?</p>