O2- < S2- < P3- < Br-
Na+ < Mg2+ < Li+ < Be2+
feel free to @ me if I'm wrong
Search found 29 matches
- Fri Dec 07, 2018 2:29 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Least to Most Polarizable/Polarizing Power
- Replies: 3
- Views: 2072
- Fri Dec 07, 2018 2:20 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: calculating pH
- Replies: 1
- Views: 278
calculating pH
In my chem discussion my TA mentioned that the sig fig rules for logs are different, so if we're given a question involving calculating pH=-log(concentration) then how would we go about determining the number of sig figs?
- Fri Dec 07, 2018 2:13 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Compound
- Replies: 2
- Views: 297
Coordination Compound
What is the difference between a coordination compound and a chelate? Is a chelate a specific type of coordination compound?
- Fri Dec 07, 2018 2:05 pm
- Forum: Bronsted Acids & Bases
- Topic: Lewis Acids and Bases and Bronsted?
- Replies: 5
- Views: 642
Re: Lewis Acids and Bases and Bronsted?
A Lewis acid can accept a pair of lone electrons and a lewis base can donate a pair of lone electrons. A Bronsted acid is a proton donor and a Bronsted base is a proton acceptor. Most Bronsted acids contain an H+ ion that breaks off while a lewis acid may have unfilled octects or have room to accept...
- Fri Dec 07, 2018 1:43 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Neutral Ligands
- Replies: 1
- Views: 241
Neutral Ligands
Can someone list some common neutral ligands? Not knowing them confused me when asked to find the charge of a metal in a charged ion...
- Fri Dec 07, 2018 1:32 pm
- Forum: Naming
- Topic: Naming Fe coordination compounds
- Replies: 4
- Views: 500
Re: Naming Fe coordination compounds
When the coordinate compound has an overall negative charge then the Latin stem for the metal's symbol is used. In the case of Iron (Fe) its ferrate + ion.
- Fri Dec 07, 2018 1:24 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Oxalate Structure
- Replies: 1
- Views: 259
Re: Oxalate Structure
An oxalate ion has the formula C204 therefore the two carbons are connected by a single bond with two oxygens connected to each carbon one by a single bond the other by a double bond. However "polydentate" refers to a ligand with more than one site of attachment in this case oxalate is a b...
- Sat Dec 01, 2018 9:30 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: pi and sigma bonds
- Replies: 3
- Views: 840
pi and sigma bonds
Since single bonds have one sigma bond and a double bond has one sigma bond and one pi bond AND a sigma bond has the ability to rotate while a pi bond can not, would it be correct to say that a single bond is more flexible than a double or triple bond? or how would you describe that? Hope this quest...
- Sat Dec 01, 2018 8:58 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarizing power and polarizability
- Replies: 5
- Views: 702
Re: polarizing power and polarizability
Polarizability of an anion is the measure of how easily its electron cloud can be distorted. Larger and more negatively charged anions (more electrons than protons) are highly polarizable. On the other hand, the polarizing power of a cation is the tendency to attract electrons of an anion distorting...
- Sat Dec 01, 2018 8:42 pm
- Forum: Dipole Moments
- Topic: net dipole
- Replies: 2
- Views: 344
Re: net dipole
A molecule has a net dipole if it is polar, therefore a molecule has a net dipole if it has dipole moments that do not cancel.
- Sat Dec 01, 2018 8:37 pm
- Forum: Hybridization
- Topic: 2SP^3 vs. SP^3
- Replies: 6
- Views: 812
Re: 2SP^3 vs. SP^3
Exactly, adding a number before the hybrid orbital just specifies the period it is found in. In this case period 2 would result in a coefficient of 2 before the hybrid orbital.
- Sun Nov 18, 2018 4:03 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration of Rutherfordium
- Replies: 2
- Views: 406
Re: Electron Configuration of Rutherfordium
Actually I agree with you...this electron configuration would give Rutherfordium because it is in the 6d sub shell and Thorium is found in the 5f sub shell. Hmm...can anyone explain dis?
- Sun Nov 18, 2018 3:54 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Nickel Electron Configuration
- Replies: 3
- Views: 5006
Re: Nickel Electron Configuration
Nickel would have 2 unpaired electrons. Nickel is in the 3d sub shell therefore it contains 5 orbitals that can hold up to 10 electrons. Nickel has 8 electrons and using Hund's Rule (which states that every orbital in a sub shell is occupied by one electron before an orbital is occupied by 2 electro...
- Sun Nov 18, 2018 3:44 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: cis and trans dichloroethene
- Replies: 3
- Views: 536
Re: cis and trans dichloroethene
Well first of all the polarity of the molecules are different: cis-dichloroethene is polar while trans-dichloroethene is non polar. The reason for this is the placement of the chlorine atoms within the molecule. In the cis-dichloroethene the chlorine atoms are on the same side of the carbon bond the...
- Sun Nov 11, 2018 11:53 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR
- Replies: 3
- Views: 369
VSEPR
What causes a bent shape in a 3 atom molecule?
- Sun Nov 11, 2018 11:35 pm
- Forum: Bond Lengths & Energies
- Topic: Induced dipole interation
- Replies: 2
- Views: 350
Induced dipole interation
Can someone explain what an induced dipole interaction is and why they occur (what causes an induced dipole interaction)?
- Sun Nov 11, 2018 11:31 pm
- Forum: Bond Lengths & Energies
- Topic: Bond lengths [ENDORSED]
- Replies: 3
- Views: 509
Bond lengths [ENDORSED]
Can someone explain the relationship between number of electrons in an atom and strength of a bond?
- Mon Nov 05, 2018 12:01 am
- Forum: Lewis Structures
- Topic: Steps for Lewis Structures
- Replies: 3
- Views: 341
Re: Steps for Lewis Structures
To answer ^ this question, formal charge is used to determine the best Lewis structure of a molecule. The structure with less formal charges is best because it is considered more stable.
- Sun Nov 04, 2018 11:56 pm
- Forum: Lewis Structures
- Topic: Acids and Bases
- Replies: 3
- Views: 413
Re: Acids and Bases
A Lewis structure of an acid would have many electrons (nearly a full octect) since Lewis acids accept electrons and it is more likely to gain a couple electrons then get rid of all the electrons in order to complete an octet. On the other hand, a lewis structure of a base would have few electrons s...
- Sun Nov 04, 2018 11:42 pm
- Forum: Lewis Structures
- Topic: Expanded Octet Rule
- Replies: 4
- Views: 500
Re: Expanded Octet Rule
Elements that exceed the 3p orbital have access to the 2 consecutive orbitals (so in this case the 4s and 3d orbital).
- Fri Oct 26, 2018 4:09 pm
- Forum: Ionic & Covalent Bonds
- Topic: Calculating number of valence electrons in bonds
- Replies: 5
- Views: 2742
Re: Calculating number of valence electrons in bonds
Basically, add up all the valence electrons of the atoms present (taking into consideration the number of each atom in a molecule) and add or subtract electrons if given an ion and according to the charge of that ion. (an ion with a negative charge means adding electrons and an ion with a positive c...
- Fri Oct 26, 2018 4:02 pm
- Forum: Lewis Structures
- Topic: Lewis Structures
- Replies: 8
- Views: 695
Re: Lewis Structures
The number of dots (electrons) around en element correspond to the total number of valence electrons so after you've established the central atom and bonded the other atoms around the central atoms you add the remaining electrons (total valence electrons minus bonded electrons) to the other atoms su...
- Fri Oct 26, 2018 3:50 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Spin Magnetic Quantum Number
- Replies: 6
- Views: 946
Re: Spin Magnetic Quantum Number
I don't think the spin magnetic quantum number can have a value of zero because the quantum numbers are used to describe the position of an electron in an atom and specifically the spin magnetic quantum number describes the direction of the electron's spin. An electron has either a negative spin or ...
- Fri Oct 19, 2018 9:29 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Valence Electrons for d-block
- Replies: 2
- Views: 865
Re: Valence Electrons for d-block
You could also use the periodic table to determine the # of electrons in the d orbital. The number of electrons in the d orbital correspond to their order in the transition metal portion of the periodic table. For examples, Scandium is the first transition metal so its has one electron in the 3d orb...
- Fri Oct 19, 2018 8:57 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Tips and Tricks
- Replies: 4
- Views: 1416
Re: Tips and Tricks
Another tip in memorizing the orbital drawings is that anything like dxz, dyz, dxy, etc have the lobes on the planes while drawings like dx^2y^2, dz^2, etc has the lobes on the axis. Of course, f orbitals are more complicated however I'm pretty sure there will not be a question asking for f-orbital ...
- Fri Oct 19, 2018 8:29 am
- Forum: Trends in The Periodic Table
- Topic: s, p, d, f
- Replies: 16
- Views: 4350
Re: s, p, d, f
Another distinction between the orbitals is the number of nodal planes. For examples, the s orbital has none, the p orbitals have one, the d orbitals have two, and the f orbitals have three.
- Fri Oct 05, 2018 9:36 am
- Forum: SI Units, Unit Conversions
- Topic: Clarification on unit conversions
- Replies: 4
- Views: 321
Re: Clarification on unit conversions
Right! A meter can fit a lot more nanometers (10^9 nanometers for every meter) so it would make sense that the number of nanometers is greater, therefore multiplying the number of meters (by 10^9) to get nanometers makes sense.
- Fri Oct 05, 2018 9:24 am
- Forum: Balancing Chemical Reactions
- Topic: Post-Module Assessment typo?? - Balancing Chemical Reactions
- Replies: 3
- Views: 438
Re: Post-Module Assessment typo?? - Balancing Chemical Reactions
The correct balanced equation would be CH4+2O2>CO2+2H2O not 2CH4+4O2>2CO2+4H2O. The coefficients of the equation can be further simplified by dividing by 2 therefore the balanced equation has a ratio of 1:2:1:2.
- Fri Oct 05, 2018 9:16 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: diatomic elements
- Replies: 12
- Views: 9987
Re: diatomic elements
My TA taught us another method to remember the diatomic elements. She refers to them as gens and ines. Ex. HydroGEN and fluorINE