Search found 30 matches

by Michael Park
Sun Jun 10, 2018 11:28 am
Forum: Identifying Acidic & Basic Salts
Topic: Final
Replies: 3
Views: 254

Re: Final

We do not need to know this for the final.
by Michael Park
Sun Jun 10, 2018 11:26 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: electron configuration of Palladium
Replies: 2
Views: 224

Re: electron configuration of Palladium

^Agreed. I believe Professor Lavelle stated we would only need to know electron configurations (and the exceptions) up to the 4th row orbital level on the periodic table.
by Michael Park
Sun Jun 10, 2018 11:19 am
Forum: Lewis Acids & Bases
Topic: Lewis vs Bronsted
Replies: 4
Views: 207

Re: Lewis vs Bronsted

You should probably know all the definitions to be prepared for the exam
by Michael Park
Mon Jun 04, 2018 11:04 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: pi and sigma bonds
Replies: 3
Views: 154

Re: pi and sigma bonds

Can you be more specific about what you don't understand?

https://chem.libretexts.org/Textbook_Ma ... try_(CK-12)/09%3A_Covalent_Bonding/9.20%3A_Sigma_and_Pi_Bonds
by Michael Park
Mon Jun 04, 2018 11:03 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: 4 ligands shape?
Replies: 6
Views: 187

Re: 4 ligands shape?

I don't think we need to know the difference between those two structures, only that they have 4 ligands attached to the central atom.
by Michael Park
Mon Jun 04, 2018 11:02 am
Forum: Naming
Topic: Naming
Replies: 9
Views: 445

Re: Naming

An ion is any particle that has an electrostatic charge
by Michael Park
Sun May 27, 2018 8:15 pm
Forum: Lewis Structures
Topic: Single electron
Replies: 5
Views: 127

Re: Single electron

Isabel is correct. Because of the unpaired electrons in the valence shell, radicals are generally unstable and very reactive.
by Michael Park
Sun May 27, 2018 8:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity
Replies: 2
Views: 81

Re: Polarity

It depends on the electronegativity of each atom in the molecule, so no it cannot be in every molecule. The trend for electronegativity increases up a group and across a period, so elements like fluorine, chlorine, and nitrogen have pretty high electronegativity. This means that they have a greater ...
by Michael Park
Sun May 27, 2018 8:02 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 1
Views: 90

Re: Molecular Shape

Yes it does.

https://www.ncl.ac.uk/media/wwwnclacuk/ ... ySheet.pdf

This link explains how CO2 initial VSEPR structure is technically tetrahedral, but because of the double bonds present, it is a linear structure.

Hope it helps.
by Michael Park
Sun May 27, 2018 7:58 pm
Forum: Lewis Structures
Topic: Lone pair arrangement
Replies: 4
Views: 180

Re: Lone pair arrangement

Pretty sure we can put it anywhere, as long as its on the correct atom.
by Michael Park
Mon May 21, 2018 1:35 am
Forum: Dipole Moments
Topic: lone pairs
Replies: 3
Views: 124

Re: lone pairs

No. Only shared electrons between atoms can have dipole moments (the slightly positive and negative charges because of uneven electonegativity). Lone pairs do not contribute to this.
by Michael Park
Mon May 21, 2018 1:33 am
Forum: Ionic & Covalent Bonds
Topic: condensed phase
Replies: 2
Views: 99

Re: condensed phase

Condensed (atoms/molecules). It refers to a solid or a liquid.
by Michael Park
Mon May 21, 2018 1:33 am
Forum: Octet Exceptions
Topic: Octet Rules
Replies: 4
Views: 242

Re: Octet Rules

No. For example, hydrogen fulfills its incomplete octet with 2 valence electrons, beryllium is filled with 6. Many group 3 elements have this phenomena.
by Michael Park
Sun May 13, 2018 7:06 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic vs Covalent vs Metallic Bonds
Replies: 6
Views: 237

Re: Ionic vs Covalent vs Metallic Bonds

Ionic bonds are generally made up of elements that have very different electronegativities (Na and Cl), while covalent bonds are made up of elements with similar electronegativities (CH4). Metallic bonds are formed by attraction between metal ions and the sea of electrons.
by Michael Park
Sun May 13, 2018 7:02 pm
Forum: Trends in The Periodic Table
Topic: electron affinity vs electronegativity?
Replies: 2
Views: 709

Re: electron affinity vs electronegativity?

Electron affinity is the energy required to add an electron to a neutral atom. Electronegativity is the tendency of an atom to attract electrons toward itself; higher electronegativity means more energy is required to "take away" the electron. For example, fluorine is the most electronegat...
by Michael Park
Sun May 13, 2018 6:59 pm
Forum: Trends in The Periodic Table
Topic: Q 2.67
Replies: 2
Views: 121

Re: Q 2.67

This is an exception to the rule. Electron affinity is the energy it takes to add an electron to something. There are 2 electrons present in the 2p subshell in carbon's electron configuration, while there are 3 in the 2p shell for nitrogen. Because nitrogen's half filled electron shell is more stabl...
by Michael Park
Mon May 07, 2018 12:07 am
Forum: Quantum Numbers and The H-Atom
Topic: Difference between the quantum number for particle and electron
Replies: 3
Views: 195

Re: Difference between the quantum number for particle and electron

the particle is the electron. the principle quantum number is the orbital the electron rotates in (S,P,D,F)
by Michael Park
Mon May 07, 2018 12:00 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Polarity [ENDORSED]
Replies: 4
Views: 191

Re: Polarity [ENDORSED]

Electron configurations only show the total number of electrons in a single element. Polarity is unrelated to this.
by Michael Park
Sun May 06, 2018 11:56 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron configuration
Replies: 7
Views: 241

Re: Electron configuration

I don't think knowing if the electron is spinning up or down (negative or positive) is necessary. As long as you follow the laws for the other things you should be fine
by Michael Park
Sun Apr 29, 2018 7:19 pm
Forum: Quantum Numbers and The H-Atom
Topic: Four Different Quantum Numbers
Replies: 7
Views: 237

Re: Four Different Quantum Numbers

Only the first three quantum numbers (n, l, ml,) can be the same. Electron spin must either be 1/2 or -1/2
by Michael Park
Sun Apr 29, 2018 7:12 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: test 2
Replies: 2
Views: 159

Re: test 2

No it will not appear on test 2
by Michael Park
Sun Apr 29, 2018 7:09 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: hw 2.13 [ENDORSED]
Replies: 2
Views: 115

Re: hw 2.13 [ENDORSED]

They describe the locations of electrons in a P-orbital. So instead of saying "these electron are in the front and back," we can say "their positions are on the x-axis"
since they are in P-orbital, we state their location as "Px"

same idea for Py and Pz
by Michael Park
Sun Apr 22, 2018 10:10 pm
Forum: Photoelectric Effect
Topic: nm vs m
Replies: 3
Views: 144

Re: nm vs m

Depends on what the question is asking for.
by Michael Park
Sun Apr 22, 2018 10:03 pm
Forum: Properties of Electrons
Topic: Electromagnetic radiation
Replies: 3
Views: 166

Re: Electromagnetic radiation

Electromagnetic radiation shows characteristics of both a wave and a particle.
by Michael Park
Sun Apr 22, 2018 10:01 pm
Forum: Properties of Light
Topic: Wavelength/frequency
Replies: 11
Views: 400

Re: Wavelength/frequency

Energy = [(Planck's Constant) x (Speed of light)] / [wavelength]

Because wavelength is in the denominator, as the wavelength increases, energy decreases.
by Michael Park
Fri Apr 13, 2018 3:30 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Molar Mass [ENDORSED]
Replies: 2
Views: 189

Re: Molar Mass [ENDORSED]

Atomic mass: The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass units or amu. By definition, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu. Molar mass: the mass of a given substance (chemical element or chemical compound...
by Michael Park
Fri Apr 13, 2018 3:24 pm
Forum: SI Units, Unit Conversions
Topic: Length Units
Replies: 15
Views: 525

Re: Length Units

Yes. But the correct units they want should be specified within the question.
by Michael Park
Fri Apr 13, 2018 3:21 pm
Forum: SI Units, Unit Conversions
Topic: Volume V Density [ENDORSED]
Replies: 5
Views: 271

Re: Volume V Density [ENDORSED]

Volume: Volume is the quantity of three-dimensional space occupied by a liquid, solid, or gas. Common units used to express volume include liters, cubic meters, gallons, milliliters, teaspoons and ounces. Density: Density is defined as the ratio between mass and volume or mass per unit volume. It is...
by Michael Park
Fri Apr 13, 2018 3:20 pm
Forum: Significant Figures
Topic: Significant figures
Replies: 4
Views: 262

Re: Significant figures

Techincally, yes. You should not be rounding using sig figs during your calculations to get the most accurate answer. Once you have a final answer, then use sig figs.
by Michael Park
Fri Apr 13, 2018 3:18 pm
Forum: Limiting Reactant Calculations
Topic: Two limiting reactants?
Replies: 10
Views: 780

Re: Two limiting reactants?

Two reactants cannot limit each other. You can have both reactants be used up completely in equal ratios.

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