CHEMISTRY COMMUNITY

Jasmine Reddy DIS 1E

Greatest ionic character is between the species with the most polarizability/greatest polarizing power because the electron clouds are more distorted, creating dipole moments. Greatest covalent character is between species with the least polarizability/least polarizing power. In my notes, I wrote d...

Jasmine Reddy DIS 1E

How do lone pairs affect the net dipole of a molecule?
How can you determine if a molecule has a net dipole by looking at its VSEPR formula?
How can you determine the overall polarity of a molecule by looking at its lewis structure?

Jasmine Reddy DIS 1E

When determining the polarizing power of a cation, which is more important: size of the cation or charge of the cation?

Jasmine Reddy DIS 1E

In class, we learned that the larger the anion, the more polarizable it is.
How is size of an anion measured in this case? Is size referring to ionic radii?

Jasmine Reddy DIS 1E

Thank you so much for all that you do!

Jasmine Reddy DIS 1E

Given just a ligand, how can you determine the maximum number of places on the ligand that can bind simultaneously to a single metal center?

Ex. For $(CO_{3})^{2-}$ , how do you determine if it is monodentate, bidentate, or tridentate ligand?

Jasmine Reddy DIS 1E

How do we determine if a given molecule is a ligand?

Jasmine Reddy DIS 1E

How do we determine the charge of a ligand in a coordination compound (in order to find the oxidation number of the metal).
Ex. For $[CO(NH_{3})_{6}]^{3+}$ , how would we know the charge of NH3?

Jasmine Reddy DIS 1E

How do you determine which (covalently-bonded) molecule will have more ionic character?

How do you determine which (ionic compound) will have more covalent character?

Jasmine Reddy DIS 1E

What are the relative ionization energies and electron affinities of C, N, O, and F? Why?

Are there any other ionization energy or electron affinity trend exceptions?

Jasmine Reddy DIS 1E

Why does a larger atom have stronger intermolecular forces?
Also, when we refer to the size of an atom, are we referring to its molecular mass, atomic number, or atomic radius?

Jasmine Reddy DIS 1E

Why does a larger atom result in a weaker bond?
Also, when we refer to the size of an atom, are we referring to its molecular mass, atomic number, or atomic radius?

Jasmine Reddy DIS 1E

If lone pair-lone pair repulsion is the strongest, and lone pairs want to maximize the distance between themselves, then why in H20 are the two lone pairs next to each other on the oxygen (resulting in a bent shape), as opposed to one pair being on top of the oxygen, and one pair being below the oxy...

Jasmine Reddy DIS 1E

Is there a way to determine which intermolecular forces will occur between certain molecules solely by looking at the chemical equation (without drawing the lewis structure)? For example, would you be able to tell which intermolecular forces would occur between H2SeO4 molecules without drawing the l...

Jasmine Reddy DIS 1E

When using the Lewis Structure of a molecule to determine the molecular shape, should we use the lowest energy Lewis Structure by checking formal charges, and using the octet exceptions (expanded octet, etc.) when necessary?

Jasmine Reddy DIS 1E

What is distortion? What is polarizability? How are they related?

Jasmine Reddy DIS 1E

What measurement are we using to compare the sizes of atoms/molecules? (ex. molar mass, atomic radius, atomic number, number of electrons)

How does size of an atom/molecule affect distortion?

Jasmine Reddy DIS 1E

In chemistry, how do we distinguish between non-polar and polar covalent bonds?

I remember learning that a C-H bond is non-polar, even though Carbon and Hydrogen don't have the same electronegativities.

Jasmine Reddy DIS 1E

How do you find the maximum positive and negative oxidation number for an element?

Jasmine Reddy DIS 1E

As others have said, hydrogen, helium, lithium, and beryllium only have s subshells. Each s subshell can only hold 2 e-. These elements do not have the p subshells required to hold 8 valence e-.

Jasmine Reddy DIS 1E

Why is 4s filled with electrons before 3d?

Then, why does 4s have higher energy than 3d once it is filled?

Jasmine Reddy DIS 1E

Which elements can form expanded octets? Why can these elements form expanded octets?

In what circumstances do the elements that are capable of having expanded octets form expanded octets? (Aren't elements most stable with 8 valence electrons?)

Jasmine Reddy DIS 1E

Why is it harder to remove a second electron from an atom (higher ionization energy)?

Jasmine Reddy DIS 1E

Given the magnetic quantum number, what information can we directly deduce about an orbital?

Jasmine Reddy DIS 1E

Why are P, D, F orbitals distinguished with X, Y, and Z (ex. Px, Py, Pz, Dxy, Dyz, etc.)? Is it just to show what axis the orbitals and lobes are located along?

Jasmine Reddy DIS 1E

I know that effective nuclear charge relates to electron shielding, but what is it exactly? How does it relate to Coulomb's law?

Jasmine Reddy DIS 1E

I would also recommend knowing how to convert from g to kg, as kg is the SI unit for mass.

Jasmine Reddy DIS 1E

For our purposes, will the value of delta X always be the diameter of the atom?

Jasmine Reddy DIS 1E

What is the difference between free and bound electrons?

Jasmine Reddy DIS 1E

How is the intensity of a wave/light source measured?

Also, for our purposes, how are we defining "energy"?

Jasmine Reddy DIS 1E

When taking values from the periodic table (ex. for calculating molar mass), how many significant figures do you round to?

Jasmine Reddy DIS 1E

What is the correct answer for #14?
#14.
339.20 g of a cobalt metal is reacted with fluorine gas to produce 996.08 g of a compound. What is the empirical formula of the new compound?

How can we find the correct answers for the pre/post assessments?

Jasmine Reddy DIS 1E

Question #17 states, "During a summer camping weekend 4 moles of butane (C4H10) gas were used for cooking. Chose the right balanced equation for the combustion of 4 moles of butane gas. What is the net number of moles of gas produced?" How do you calculate the net number of moles of gas pr...

Jasmine Reddy DIS 1E

Question 14 on the Empirical and Molecular Formulas pre-test states, "If vitamin C is 40.9% C, 4.58% H, and 54.5% O what is its empirical formula?"
Are these percentages referring to mass percentage of each element within vitamin C?

CHEMISTRY COMMUNITY

Search found 34 matches

Re: Polarizable

Overall Polarity of the Molecule/Net Dipole

Polarizing Power: Size vs. Charge

Size and Polarizability

Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]

Ligand Binding Places

Identifying Ligands

Ligand Charge

Ionic and Covalent Character

Ionization Energy and Electron Affinity Trend Exceptions

Size of Atom and Strength of Attractive/Intermolecular Forces

Atom Size and Bond Strength

Position of Lone Pairs in H20

Determining Intermolecular Forces

Lowest Energy Lewis Structures

Distortion, Polarizability

Effect of Size of Atom/Molecule on Distortion

Non-polar and Polar Covalent Bonds

Oxidation Number

Re: H, He, Li, Be Rule

3d and 4s: filling and energy

Expanded Octet Circumstances

Removing 2nd Electron

Magnetic Quantum Number

Significance of XYZ to PDF orbitals

Effective Nuclear Charge

Re: SI Units

Value of Delta X

Free vs. Bound Electrons

Properties of Light

Re: All students read this sig fig post [ENDORSED]

Correct Answer for Audio-Visual Focus-Topics Empirical and Molecular Formulas Pre-Module Assessment

Audio Visual Focus Topics Balancing Chemical Equations Pre Assessment

Audio Visual Focus Topic Empirical and Molecular Formulas Pre-Assessment