Search found 37 matches

by Binyu You
Fri Nov 20, 2020 8:43 am
Forum: Bond Lengths & Energies
Topic: Ionic Character
Replies: 6
Views: 2874

Re: Ionic Character

I believe NaI has a higher ionic character because the difference between electronegativity of Na and I is bigger than those with Na and Br. Remember electronegativity increase to the right and decrease from up to down.
by Binyu You
Fri Nov 20, 2020 8:41 am
Forum: Bond Lengths & Energies
Topic: Boiling/Melting Point
Replies: 16
Views: 55

Re: Boiling/Melting Point

I would say to look more into intermolecular bonds. If comparing different elements' boiling or melting point, the higher it is, the stronger the bond is. Several factors to consider to rank boiling/melting point include if hydrogen bond exist as well as the size of an element. The more protons it h...
by Binyu You
Fri Nov 20, 2020 8:33 am
Forum: Octet Exceptions
Topic: Octet Rule Exceptions
Replies: 20
Views: 139

Re: Octet Rule Exceptions

I believe B is an exception where when 6 electrons can fill up the octet. Hydrogen is an exception were it only need two electrons to complete the octet. P,S, and Cl are exceptions where they can have more than 8 electrons in the octet.
by Binyu You
Fri Nov 20, 2020 8:24 am
Forum: Dipole Moments
Topic: Dipole Dipole Interactions
Replies: 7
Views: 33

Re: Dipole Dipole Interactions

I believe dipole dipole interactions is when two polar molecules with each other and when the slightly positive end interact with the slightly negative end.
by Binyu You
Fri Nov 20, 2020 8:17 am
Forum: Formal Charge and Oxidation Numbers
Topic: Lewis acids and bases
Replies: 15
Views: 31

Re: Lewis acids and bases

Lewis acid accepts electrons. I just think a way to remember to better is that acid starts with a and accepts electron. Lewis base, on the other hand, donate electrons.
by Binyu You
Thu Nov 12, 2020 9:13 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Covalent Character
Replies: 3
Views: 17

Covalent Character

What does an ionic bond can have more covalent character, and an covalent bond can also have ionic character specifically mean? Also, I am wondering what does a distorted electron mean in this context where highly distorted electron are being highly polarizable?
by Binyu You
Thu Nov 12, 2020 9:07 am
Forum: Quantum Numbers and The H-Atom
Topic: Spin States and Hund's Rule
Replies: 8
Views: 31

Re: Spin States and Hund's Rule

I agree with Joey! I believe that direction really does not matter that much, what is more important is to make sure they all spin in the same way.
by Binyu You
Thu Nov 12, 2020 9:02 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Subshell Energies
Replies: 6
Views: 34

Re: Subshell Energies

I only know when you have(subshells) s, d, p, f, a 1s will definitely has a lower energy than a 3s.
by Binyu You
Thu Nov 12, 2020 8:59 am
Forum: Bond Lengths & Energies
Topic: Intermolecular Potential Energy
Replies: 3
Views: 165

Re: Intermolecular Potential Energy

r I believe, is the internuclear distance, which is the distance between two molecules.
by Binyu You
Thu Nov 12, 2020 7:47 am
Forum: Electronegativity
Topic: determining electronegativity
Replies: 30
Views: 206

Re: determining electronegativity

Based on what Dr. Lavelle said, I think it depends on both ionization energy and electron affinity. The higher the ionization energy and electron affinity is, the higher the electronegativity is, thus meaning more shared electrons are being pulled toward it. The lower the ionization energy and elect...
by Binyu You
Sat Nov 07, 2020 2:05 am
Forum: Bond Lengths & Energies
Topic: ionization energy
Replies: 6
Views: 41

Re: ionization energy

Because Oxygen has a lower ionization energy where it requires less energy to be removed an electron than nitrogen and fluroine
by Binyu You
Sat Nov 07, 2020 1:47 am
Forum: Electronegativity
Topic: Fluorine
Replies: 7
Views: 39

Fluorine

Why does fluorine has the highest electronegativity in all elements of periodic table?
by Binyu You
Sat Nov 07, 2020 1:44 am
Forum: Electronegativity
Topic: Noble Gases
Replies: 40
Views: 1345

Re: Noble Gases

I do not think noble gases should be included.. This is because noble gas a complete octet, they do not need to gain more electrons. Xenon on the other hand has a large atomic radius, making it less tightly packed thus has weak control over its electrons.
by Binyu You
Sat Nov 07, 2020 1:36 am
Forum: Lewis Structures
Topic: lewis structure
Replies: 17
Views: 44

Re: lewis structure

I think the positive(+) or negative(-) sign outside the brackets usually shows the molecule's charge. If the atom is neutral, than no sign is needed.
by Binyu You
Sat Nov 07, 2020 1:30 am
Forum: Ionic & Covalent Bonds
Topic: Atomic Radius
Replies: 38
Views: 141

Re: Atomic Radius

The atomic radius decreases when going across the period because there are more protons when moving to the right in the periodic table. As proton is added, the attraction grow, which makes the electrons tightly packed, thus making atomic radius smaller.
by Binyu You
Thu Oct 29, 2020 10:04 am
Forum: Trends in The Periodic Table
Topic: Atomic Radii
Replies: 11
Views: 294

Re: Atomic Radii

I guess you need to understand how the trend of atomic radius is in periodic table. It can be used to determine trends such as electron affinity and ionization energy. So it is still fairly important to know.
by Binyu You
Thu Oct 29, 2020 9:59 am
Forum: DeBroglie Equation
Topic: p
Replies: 15
Views: 86

Re: p

p, the momentum, is calculated by mass*velocity. Mass here uses the unit of kg while velocity is in m/s. Use p when DeBrogile and Heisenberg's indeterminacy equation because it can be used to calculate other such as wavelengths.
by Binyu You
Thu Oct 29, 2020 9:55 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Wave Function Quantum Numbers
Replies: 11
Views: 87

Re: Wave Function Quantum Numbers

n is the shell, which determines the energy and size;
l represents the subshell, which determines the shape;(it has s, l, p and d)
ml is the orbital, where orientation is involved;
ms is the magnetic spin number, which is the spin of electron(which can be either -1/2 or 1/2)
by Binyu You
Thu Oct 29, 2020 9:50 am
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 30
Views: 330

Re: Atomic Radius

The atomic radius increases when going down a group as more shells are added, whereas the radius decrease when gong from left to right due to the fact that more electrons are added as it gains shells when it gets bigger. Therefore the atomic radius is the highest in the bottom left part of of the pe...
by Binyu You
Thu Oct 29, 2020 9:46 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Subshell Definition
Replies: 9
Views: 54

Re: Subshell Definition

I believe in terms of n, l, and ml, the "n" refers to the first quantum number, which is the shell. "l" is the second quantum number, which is the subshell, and "ml" is the third quantum number, referring to as the oribital.
by Binyu You
Thu Oct 29, 2020 9:40 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: position units
Replies: 19
Views: 98

Re: position units

I would like to keep it in meters because velocity's unit is m/s. Keeping it consistent to meters it more convenient and ensures you to make less mistakes.
by Binyu You
Sat Oct 24, 2020 8:56 am
Forum: DeBroglie Equation
Topic: Calculate the de Broglie wavelength
Replies: 4
Views: 28

Re: Calculate the de Broglie wavelength

I believe you only need to calculate the wavelength when asked for the Debrogile's value. If the calculated number is strange, probably just provide a short explanation will be fine.
by Binyu You
Fri Oct 23, 2020 9:28 pm
Forum: *Shrodinger Equation
Topic: Wave function
Replies: 8
Views: 80

Re: Wave function

I think the wave function is just representing the electron orbital, and the symbol of psi represents the wave while the square of psi (the symbol)represents the probability of finding an electron.
by Binyu You
Fri Oct 23, 2020 8:25 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Midterm 1
Replies: 18
Views: 189

Re: Midterm 1

I believe this will be covered in Midterm, but I don't think it will be the main focus of Midterm. For the Heisenberg Indeterminacy, you just need to understand only small things such as electron, because their momentum is lower than light, it makes them go to other pathways. This makes their pathwa...
by Binyu You
Fri Oct 23, 2020 8:20 am
Forum: Administrative Questions and Class Announcements
Topic: Where can I buy a webcam for a reasonable price?
Replies: 60
Views: 916

Re: Where can I buy a webcam for a reasonable price?

I believe you can always use another device as a camera, or you can buy this webcam on amazon.

https://www.amazon.com/s?k=webcam&rh=n ... x_alster_0 (it is 25$, and I believe it has prime)
by Binyu You
Fri Oct 16, 2020 12:44 am
Forum: Ionic & Covalent Bonds
Topic: Hydrogen bonds
Replies: 4
Views: 134

Re: Hydrogen bonds

Hydrogen bond only if a hydrogen atom bonded to either one of a N, O, or F atom.
by Binyu You
Thu Oct 15, 2020 7:23 am
Forum: Electronegativity
Topic: Electronegativity
Replies: 16
Views: 339

Re: Electronegativity

An atom that has a higher electronegativity, it pulls more electrons more toward the atom and thus form stronger bond.
by Binyu You
Thu Oct 15, 2020 7:15 am
Forum: Einstein Equation
Topic: e=hv used for particles?
Replies: 9
Views: 216

Re: e=hv used for particles?

I think it can be only used for energy of photon.
by Binyu You
Thu Oct 15, 2020 7:08 am
Forum: Properties of Light
Topic: Light Intensity and Photons
Replies: 8
Views: 59

Re: Light Intensity and Photons

Intensity is the amplitude of light, and it is the total amount of energy going through every time. I believe the way to increase intensity is to increase photon number.
by Binyu You
Thu Oct 15, 2020 3:33 am
Forum: Properties of Light
Topic: Relationship between energy of photon and energy to remove
Replies: 5
Views: 39

Re: Relationship between energy of photon and energy to remove

Yes I believe you are correct. The energy of the photon has to be greater than or equal to the energy needed for the electron to be removed even for high intensity light. If not, then electrons will not be emitted.
by Binyu You
Sun Oct 11, 2020 8:02 pm
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 75
Views: 48904

Re: How to find my posts

I believe you only need to remember what topics have you commented on, and look for your comments. On the right you can check the number of posts you have.
by Binyu You
Fri Oct 09, 2020 10:11 am
Forum: Balancing Chemical Reactions
Topic: Fractions
Replies: 26
Views: 140

Re: Fractions

As the professor mentions, I think to answer the question, we need to use whole numbers when balancing chemical reactions. Therefore, if 5/2 appears in the equation, you will have to times the whole equation by 2 to get a 5 in front of the element.
by Binyu You
Fri Oct 09, 2020 10:07 am
Forum: Balancing Chemical Reactions
Topic: Periodic Table
Replies: 50
Views: 405

Re: Periodic Table

I believe we will have the periodic table during tests, so there is no need to worry about memorization. Hopefully.
by Binyu You
Fri Oct 09, 2020 9:31 am
Forum: Molarity, Solutions, Dilutions
Topic: What does mmol stand for?
Replies: 30
Views: 236

Re: What does mmol stand for?

I think it stands for millimol. Therefore 1 mmol should be equal to 0.001 mol.
Just like milliliter and liter.
by Binyu You
Fri Oct 09, 2020 8:48 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: precision for molar masses
Replies: 14
Views: 106

Re: precision for molar masses

I believe it should be always rounded to two significant figures after the decimal point. But when molar mass is given, I will probably not round it because accuracy is important.
by Binyu You
Fri Oct 09, 2020 8:29 am
Forum: Significant Figures
Topic: Which number determines sig figs of the answer?
Replies: 26
Views: 140

Re: Which number determines sig figs of the answer?

I think for addition or subtraction, the answer of the question should have equal number or less significant figures than the number with the least significant figures in the question. In the case of multiplication or division, the answer should have the same amount of significant figures with the n...

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