CHEMISTRY COMMUNITY

Michael Park

We do not need to know this for the final.

Michael Park

^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.

Michael Park

You should probably know all the definitions to be prepared for the exam

Michael Park

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

Michael Park

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.

Michael Park

An ion is any particle that has an electrostatic charge

Michael Park

Isabel is correct. Because of the unpaired electrons in the valence shell, radicals are generally unstable and very reactive.

Michael Park

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 ...

Michael Park

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.

Michael Park

Pretty sure we can put it anywhere, as long as its on the correct atom.

Michael Park

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.

Michael Park

Condensed (atoms/molecules). It refers to a solid or a liquid.

Michael Park

No. For example, hydrogen fulfills its incomplete octet with 2 valence electrons, beryllium is filled with 6. Many group 3 elements have this phenomena.

Michael Park

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.

Michael Park

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...

Michael Park

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...

Michael Park

the particle is the electron. the principle quantum number is the orbital the electron rotates in (S,P,D,F)

Michael Park

Electron configurations only show the total number of electrons in a single element. Polarity is unrelated to this.

Michael Park

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

Michael Park

Only the first three quantum numbers (n, l, ml,) can be the same. Electron spin must either be 1/2 or -1/2

Michael Park

No it will not appear on test 2

Michael Park

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

Michael Park

Depends on what the question is asking for.

Michael Park

Electromagnetic radiation shows characteristics of both a wave and a particle.

Michael Park

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

Because wavelength is in the denominator, as the wavelength increases, energy decreases.

Michael Park

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...

Michael Park

Yes. But the correct units they want should be specified within the question.

Michael Park

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...

Michael Park

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.

Michael Park

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

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Final

Re: electron configuration of Palladium

Re: Lewis vs Bronsted

Re: pi and sigma bonds

Re: 4 ligands shape?

Re: Naming

Re: Single electron

Re: Polarity

Re: Molecular Shape

Re: Lone pair arrangement

Re: lone pairs

Re: condensed phase

Re: Octet Rules

Re: Ionic vs Covalent vs Metallic Bonds

Re: electron affinity vs electronegativity?

Re: Q 2.67

Re: Difference between the quantum number for particle and electron

Re: Polarity [ENDORSED]

Re: Electron configuration

Re: Four Different Quantum Numbers

Re: test 2

Re: hw 2.13 [ENDORSED]

Re: nm vs m

Re: Electromagnetic radiation

Re: Wavelength/frequency

Re: Molar Mass [ENDORSED]

Re: Length Units

Re: Volume V Density [ENDORSED]

Re: Significant figures

Re: Two limiting reactants?