Search found 24 matches

by Jasmine Emtage-1J
Sun May 27, 2018 11:46 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Difference in bonds
Replies: 3
Views: 219

Re: Difference in bonds

Bond strength increases with the number of bonds, so triple bond > double bond > single bond. Bond length works in the opposite manner, with the weakest bonds being the longest bonds, so triple bond < double bond < single bond.
by Jasmine Emtage-1J
Sun May 27, 2018 11:42 am
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 4
Views: 151

Re: Hybrid Orbitals

Regular orbitals fill up in the typical way, with each orbital half filling (taking on only one electron) before any of them fill completely (2 electrons total) and then filling the next orbital in the same manner (Hund's Rule). Hybrid orbitals combine so that all the valence electrons are available...
by Jasmine Emtage-1J
Sun May 27, 2018 11:29 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Types of Bonds
Replies: 6
Views: 159

Re: Types of Bonds

Sigma bonds allow atoms to rotate independently of each other, but pi bonds don't.
by Jasmine Emtage-1J
Sun May 20, 2018 9:25 pm
Forum: Dipole Moments
Topic: Meaning of a dipole
Replies: 7
Views: 177

Re: Meaning of a dipole

A dipole describes the separation of charges in a molecule of covalently bonded atoms. I'm pretty sure a dipole moment is just the measurement of the separation of those opposite charges.

Hope this helps!
by Jasmine Emtage-1J
Sun May 20, 2018 9:14 pm
Forum: Octet Exceptions
Topic: Self-Test 3.10A
Replies: 1
Views: 104

Re: Self-Test 3.10A

An expanded octet for Xe would allow it to take on 10 extra electrons (in its d-orbital) on top of the 8 it needs for its octet. When you give it 12 electrons your really only putting 4 electrons in its d-orbital.
by Jasmine Emtage-1J
Sun May 13, 2018 10:33 pm
Forum: Octet Exceptions
Topic: Expanded Octet
Replies: 2
Views: 181

Expanded Octet

How many extra electrons can atom with an expanded octet take on? Can it take on 10 extra because that's how many can fit in the d orbital?
by Jasmine Emtage-1J
Sun May 13, 2018 10:26 pm
Forum: Electronegativity
Topic: Electronegativity vs. Electron affinity
Replies: 7
Views: 261

Re: Electronegativity vs. Electron affinity

To answer your second question, I believe the less electronegative an element is, the more likely it is to be the central atom.
by Jasmine Emtage-1J
Sat May 12, 2018 3:48 pm
Forum: Lewis Structures
Topic: Charge and Structures
Replies: 2
Views: 78

Re: Charge and Structures

Yes, the formal charges on each of the atoms in the molecule should add up to the overall charge of the molecule. I don't know of any exceptions, but there might be some?
by Jasmine Emtage-1J
Sun May 06, 2018 9:31 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3d before 4s
Replies: 9
Views: 260

Re: 3d before 4s

Yes, that's correct because the 3d orbital is higher in energy than the 4s orbital.
by Jasmine Emtage-1J
Sun May 06, 2018 8:38 pm
Forum: Trends in The Periodic Table
Topic: 2.67
Replies: 3
Views: 81

Re: 2.67

Ionization energy is the smallest amount of energy it takes to remove an electron from an atom in the gas phase. The trend for ionization energy (I think that's what you're asking for) is that it increases as you move across a period because there are more protons in the nuclei, increasing the nucle...
by Jasmine Emtage-1J
Sun May 06, 2018 6:34 pm
Forum: Trends in The Periodic Table
Topic: electronegativity
Replies: 4
Views: 129

Re: electronegativity

Electronegativity describes the ability of an atom to attract electrons. The more protons an atom has (as indicated by the atomic number), the better it is at attracting electrons. That's why Oxygen has a higher electronegativity than Nitrogen. As a general rule of thumb, electronegativity increases...
by Jasmine Emtage-1J
Sun Apr 29, 2018 9:50 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Using shorthand [Ar] [ENDORSED]
Replies: 5
Views: 109

Re: Using shorthand [Ar] [ENDORSED]

I believe we can use any of the noble gases in our shorthand. Hope that helps!
by Jasmine Emtage-1J
Sun Apr 29, 2018 5:02 pm
Forum: Quantum Numbers and The H-Atom
Topic: Fourth Quantum Number
Replies: 5
Views: 168

Re: Fourth Quantum Number

I'm not sure if we actually need to calculate whether the electron is spinning up or down but if you're given the ms value of +1/2 you should know that it means the electron is spinning up and if you're given the ms value -1/2 you should know that the electron is spinning down.
by Jasmine Emtage-1J
Sun Apr 29, 2018 4:22 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 4s orbital lower in energy than 3d
Replies: 3
Views: 293

4s orbital lower in energy than 3d

I know we went over this in class on Friday, but I'm still unsure why the 3d state is higher in energy than the 4s state for Potassium and Calcium. Can someone explain why?
by Jasmine Emtage-1J
Wed Apr 25, 2018 10:55 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 891677

Re: Post All Chemistry Jokes Here

What do chemists use to make guacamole? Avogadros
by Jasmine Emtage-1J
Sun Apr 22, 2018 9:46 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Balmer Series vs Lyman Series
Replies: 4
Views: 451

Re: Balmer Series vs Lyman Series

The Paschen series ends at energy level n=3 and the Brackett series ends at energy level n=4. I don't know much more about them but I hope that helps!
by Jasmine Emtage-1J
Sun Apr 22, 2018 9:32 pm
Forum: Properties of Electrons
Topic: Circular Standing Waves
Replies: 2
Views: 115

Circular Standing Waves

I'm a little confused as to what Dr. Lavelle meant by electrons being in circular standing waves, is that just describing the discrete energy levels of electrons?
by Jasmine Emtage-1J
Sat Apr 21, 2018 12:04 pm
Forum: DeBroglie Equation
Topic: Wavelength and De Broglie Equation [ENDORSED]
Replies: 9
Views: 270

Re: Wavelength and De Broglie Equation [ENDORSED]

It's important to remember though that De Broglie can only be used with particles because they have mass, so it's not applicable to light.
by Jasmine Emtage-1J
Sun Apr 15, 2018 6:15 pm
Forum: Properties of Light
Topic: How do I use Planck's constant? [ENDORSED]
Replies: 4
Views: 160

Re: How do I use Planck's constant? [ENDORSED]

In the equation for the energy per photon, E=hv, h is Planck's constant and it's multiplied by frequency (v). I hope that helps!
by Jasmine Emtage-1J
Sun Apr 15, 2018 4:35 pm
Forum: Properties of Light
Topic: HW chapter 1 question 3
Replies: 2
Views: 94

Re: HW chapter 1 question 3

The speed of light is constant as shown by the equation 'c=(lambda)(v)'. If the frequency decreases, wavelength must increase keeping the speed the same constant value.
by Jasmine Emtage-1J
Sun Apr 15, 2018 4:05 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect Expirement [ENDORSED]
Replies: 4
Views: 140

Re: Photoelectric Effect Expirement [ENDORSED]

To add to the previous comment, the experiment showed that high frequency light can eject electrons even if the light has low intensity. When the intensity of low frequency light was increased, the light still couldn't eject electrons from the metal surface because the frequency was the problem, not...
by Jasmine Emtage-1J
Sat Apr 14, 2018 9:48 pm
Forum: Properties of Light
Topic: formula for light problems
Replies: 2
Views: 96

Re: formula for light problems

I'm not sure that we'll always have to rearrange these equations, but for this problem we did because we were not given frequency (v). In order to find frequency we had to solve E=hv for v (v=E/h). The problem was asking for wavelength so we solved c=('lambda')(v) for lambda (lambda=c/v) and substit...
by Jasmine Emtage-1J
Sat Apr 14, 2018 9:36 pm
Forum: Properties of Light
Topic: Units for wavelengths [ENDORSED]
Replies: 6
Views: 198

Re: Units for wavelengths [ENDORSED]

Yes, wavelength is represented by lambda and frequency is represented by v
by Jasmine Emtage-1J
Wed Apr 11, 2018 5:44 pm
Forum: Balancing Chemical Reactions
Topic: Fastest way to balance chemical equation
Replies: 9
Views: 656

Re: Fastest way to balance chemical equation

Another tip is to balance any freestanding elements last because they're the easiest to manipulate.

Go to advanced search