Uh… hi? This is a topic about periodic table / chemistry stuff (feel free to move this topic ST)…

• 118 elements
  
• One periodic table
  
• Lots of molecules
  
• Click this link
  

Did you know:

• Copernicium may be a gaseous metal, but we don't know for sure
  
• Four new elements got official names on November 30, 2016 - nihonium, moscovium, tennessine, and oganesson.
  
• Astatine is a metalloid. Trust me.
  
• Radon is the only noble gas not to have its symbol be the first two letters of its name. Helium is the only noble gas not to end in -on.
  
• Bismuth is actually radioactive but lasts longer than the age of the universe.
  

So, yeah.

Do you know what each of these chemical formulas are for? :
H2O
CH4
C2H6O
H2SO4
C6H6

Here is the periodic table:

| H | |He|
| Li |Be| | B | C | N | O| F |Ne|
|Na|Mg| |Al | Si | P | S |Cl |Ar |
| K |Ca|Sc|Ti | V |Cr |Mn|Fe|Co|Ni |Cu|Zn|Ga|Ge|As|Se|Br |Kr |
|Rb|Sr | Y |Zr|Nb|Mo|Tc |Ru|Rh|Pd|Ag|Cd| In|Sn |Sb|Te| I |Xe|
|Cs|Ba| |Hf|Ta |W |Re|Os| Ir | Pt|Au|Hg| Tl |Pb |Bi |Po|At |Rn|
|Fr |Ra| |Rf|Db|Sg|Bh|Hs|Mt |Ds|Rg|Cn|Nh| Fl |Mc|Lv|Ts |Og|

|La|Ce|Pr|Nd|Pm|Sm|Eu|Gd|Tb|Dy|Ho|Er |Tm|Yb|Lu|
|Ac|Th|Pa| U|Np |Pu|Am|Cm|Bk|Cf|Es|Fm|Md|No|Lr |

Several symbols that may be useful in chemistry:
≡ for a triple bond
⌬ ⏣ for benzene rings
· ⋮ for electron things
⁺ ⁻ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁰ for electrical charges

For example:

Acetylene is HC≡CH
⌬ and ⏣ are two different representations of a benzene ring
Nitric oxide is ⋮N=O::
Salt (sodium chloride) consists of Na⁺ ions and Cl⁻ ions.

I'll give it a go at naming those things.

1) Water
2) Methane
3) Ethanol (alcohol)
4) Sulfuric Acid
5) Hexacarbon Hexahydrogen?

Last one is the only one I am a little iffy on.

Here is the periodic table:

| H | |He|
| Li |Be| | B | C | N | O| F |Ne|
|Na|Mg| |Al | Si | P | S |Cl |Ar |
| K |Ca|Sc|Ti | V |Cr |Mn|Fe|Co|Ni |Cu|Zn|Ga|Ge|As|Se|Br |Kr |
|Rb|Sr | Y |Zr|Nb|Mo|Tc |Ru|Rh|Pd|Ag|Cd| In|Sn |Sb|Te| I |Xe|
|Cs|Ba| |Hf|Ta |W |Re|Os| Ir | Pt|Au|Hg| Tl |Pb |Bi |Po|At |Rn|
|Fr |Ra| |Rf|Db|Sg|Bh|Hs|Mt |Ds|Rg|Cn|Nh| Fl |Mc|Lv|Ts |Og|

|La|Ce|Pr|Nd|Pm|Sm|Eu|Gd|Tb|Dy|Ho|Er |Tm|Yb|Lu|
|Ac|Th|Pa| U|Np |Pu|Am|Cm|Bk|Cf|Es|Fm|Md|No|Lr |

turkey3 wrote:

I'll give it a go at naming those things.

1) Water
2) Methane
3) Ethanol (alcohol)
4) Sulfuric Acid
5) Hexacarbon Hexahydrogen?

Last one is the only one I am a little iffy on.

Benzene.

cheddargirl wrote:

turkey3 wrote:

I'll give it a go at naming those things.

1) Water
2) Methane
3) Ethanol (alcohol)
4) Sulfuric Acid
5) Hexacarbon Hexahydrogen?

Last one is the only one I am a little iffy on.

Benzene.

Thank you! I'm taking my first chemistry class in college right now but we did not go over Benzene yet. But now I know!

Guess what these chemical formulas refer to:

CO2
CH2O
CH5N
C4H8
N2H4

excelguru wrote:

Guess what these chemical formulas refer to:

CO2
CH2O
CH5N
C4H8
N2H4

Carbon dioxide is the first one

I'll give a go at naming the chemicals:

1) Hydrogen (water)
2) Methane
3) Ethanol (alchohol)
4) Sulfuric acid
5) Benzene

And the second one:

1) Carbon dioxide
2) Formaldehyde
3) Methylamine
4) Butatriane
5) Hydrazine

I am not exactly sure about number 4…

-Galaxydust- wrote:

1) Carbon dioxide
2) Formaldehyde
3) Methylamine
4) Butatriane (wrong)
5) Hydrazine

I am not exactly sure about number 4…

Cyclobutane

Did you mean “butatriene” when you said “butatriane”? That is C4H4, a formula which I accidentally put in there and later corrected. Sorry if you saw it as C4H4.

Chemistry jokes:

• I was going to tell you a joke about sodium but Na…
  
• Whoa, that sodium is overreacting!
  
• Once I told neon a funny joke but he didn't react.
  
• I also have a few more about noble gases but they argon.
  
• Chlorine is also overreacting!!
  
• Oh look, they are reacting to each other! This should get a bit salty.
  
• Never trust those atoms because they make up everything.
  
• Why did the monster under the bed get put in jail? Because he was under a rest.
  
• Why wasn't that joke about chemistry? I thought it would get neon to react.
  
• I was going to tell you a joke about sodium hydroxide but Na - OH! I have some more!
  
• I DID have some more but now they all argon.
  

Hey. I'm studying chemistry, and I'm wondering why Palladium has 18 valence electrons, 10 more than the maximum 8, which I was taught in highschool.
Also, why does Palladium have an empty 5th electron shell?

Please answer these questions. Thanks

MrJohnSmith wrote:

Hey. I'm studying chemistry, and I'm wondering why Palladium has 18 valence electrons, 10 more than the maximum 8, which I was taught in highschool.
Also, why does Palladium have an empty 5th electron shell?

Please answer these questions. Thanks

Something related to the quirks in electron filling. I don't exactly understand how they happen.

MrJohnSmith wrote:

Hey. I'm studying chemistry, and I'm wondering why Palladium has 18 valence electrons, 10 more than the maximum 8, which I was taught in highschool.
Also, why does Palladium have an empty 5th electron shell?

Please answer these questions. Thanks

Are you familiar with the quantum mechanical model of the atom? It accounts for the fact that atoms beyond the second period can have more than 8 valence electrons. If you aren't, don't worry about the name. It's really not that hard, and in practice you really only need to have the pattern of how electron orbitals are filled (Aufbau principle and Hund's rule) memorized.

In Palladium's case though, not even the Aufbau principle can explain it. It's an exception. According to the Aufbau principle, Palladium should have 2 valence electrons, which would be in the 5th shell/principle energy level. Here's a Quora question I found on it with answers from people who know way more than I do that talk about why:
https://www.quora.com/Why-is-the-electron-configuration-of-palladium-5s0-4d10
Note that you probably don't need to know exactly why the exceptions occur, just that there are exceptions.