Search found 30 matches

by Sofia Ban
Wed Dec 05, 2018 10:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar or nonpolar
Replies: 4
Views: 98

Re: Polar or nonpolar

It doesn't really matter where the Cl atoms are located. If the other two atoms surrounding the central atom are not chlorine, the molecule will be polar.
by Sofia Ban
Wed Dec 05, 2018 10:04 pm
Forum: Naming
Topic: Oxidation Numbers
Replies: 3
Views: 61

Re: Oxidation Numbers

No, oxidation numbers can be negative,too. For example, the element Fluorine always has an oxidation number of -1.
by Sofia Ban
Wed Dec 05, 2018 10:02 pm
Forum: Hybridization
Topic: hybridization
Replies: 2
Views: 41

Re: hybridization

I believe that sp3 would be just fine.
by Sofia Ban
Thu Nov 29, 2018 12:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Chelate
Replies: 6
Views: 96

Chelate

When a ligand binds at 1 site, it is monodentate, 2 sites it is bidentate, etc, but what is a chelate and how does it differ from the other ligands? What is its significance?
by Sofia Ban
Thu Nov 29, 2018 12:20 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 10
Views: 142

Coordination Number

What is the coordination number and how do you find it?
by Sofia Ban
Thu Nov 29, 2018 12:19 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 2
Views: 62

Ligands

I have a general idea of what a ligand is, but what is its significance and how does it relate to the lewis acids/bases?
by Sofia Ban
Tue Nov 20, 2018 10:28 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: higher polarizability
Replies: 4
Views: 106

higher polarizability

If two ions have the same charge, why is the smaller one the one with higher polarizing power?
by Sofia Ban
Tue Nov 20, 2018 10:26 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Difference in vocabulary terms
Replies: 1
Views: 69

Difference in vocabulary terms

What is the different between polarizability, polarizing power, and polarization?
by Sofia Ban
Tue Nov 20, 2018 10:25 pm
Forum: Sigma & Pi Bonds
Topic: Pi Bond
Replies: 1
Views: 64

Pi Bond

A pi bond has most of its electron density between the atomic nuclei.
Why is this statement false? Also, where is most of its electron density located at then?
by Sofia Ban
Thu Nov 15, 2018 12:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity and Molecular Shape
Replies: 1
Views: 37

Re: Polarity and Molecular Shape

A molecular is polar if it has a partial negative charge on one side and a partial positive side on the other. The molecular shape shows the final shape of the molecule (since it accounts for the least amount of repulsion from lone pairs too). Molecules in which all of the atoms surrounding the cent...
by Sofia Ban
Thu Nov 15, 2018 12:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Arrangement vs Shape
Replies: 3
Views: 69

Re: Arrangement vs Shape

I think that when asked for the arrangement, it's asking for all single, double, triple bonds as well as lone pair electrons (Lewis Structure). For molecular shape, it may want just the positioning of the atoms without showing what kinds of bonds are attached (almost like a simple 3D drawing) and th...
by Sofia Ban
Thu Nov 15, 2018 11:58 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular shape
Replies: 3
Views: 59

Re: Molecular shape

The relative strength of the intermolecular forces helps determine the boiling points. Stronger intermolecular bonds require more energy to break, so substances with stronger bonds will have a higher boiling point.(vice versa) Furthermore, more branched particles have LESS surface area compared to a...
by Sofia Ban
Thu Nov 08, 2018 10:00 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Distortion and Polarization
Replies: 3
Views: 128

Re: Distortion and Polarization

Polarization is the partial or complete separation of the positive and negative electric charges in a nuclear, atomic, molecular, or chemical system. The polarity depends upon the electronegativity of the bonding atoms; most electronegative atoms pull the electronic cloud towards itself. Polarizatio...
by Sofia Ban
Thu Nov 08, 2018 9:56 pm
Forum: Dipole Moments
Topic: dipole interaction
Replies: 2
Views: 56

dipole interaction

Can someone clarify for me the relationship between polarizability, dipole moments, and fluctuating electron distribution. Also, how does the dissociation energy and interaction potential energy relate to them?
by Sofia Ban
Thu Nov 08, 2018 9:48 pm
Forum: Ionic & Covalent Bonds
Topic: Dipole and Dipole Moments
Replies: 2
Views: 59

Re: Dipole and Dipole Moments

Dipole moments occur when there is a separation of charge. They can occur between two ions in an ionic bond or between atoms in a covalent bond. They also arise from differences in electronegativity, and the larger the difference in electronegativity, the larger the dipole moment.
by Sofia Ban
Thu Nov 01, 2018 4:39 pm
Forum: Resonance Structures
Topic: Delocalized electrons
Replies: 2
Views: 82

Delocalized electrons

What does it mean to have delocalized electrons or bonds?
by Sofia Ban
Thu Nov 01, 2018 4:36 pm
Forum: Octet Exceptions
Topic: Boron Trifluoride class example
Replies: 3
Views: 77

Re: Boron Trifluoride class example

It wouldn't be correct or rather very unlikely (as said by the comment above) because the boron atoms obey a sextet rule. In this compound, the boron atom only has six valence shell electrons, but the octet rule is satisfied by the fluorine atoms around it.
by Sofia Ban
Thu Nov 01, 2018 4:29 pm
Forum: Lewis Structures
Topic: Determining Lewis Structure
Replies: 3
Views: 82

Re: Determining Lewis Structure

Formal Charge of an atom indicates the gain or loss of an electron while forming covalent bonds. An easy way to understand this concept of formal charge and stability is to think about attaining the lowest formal charge for a given Lewis structure because the one with the lowest formal charges is th...
by Sofia Ban
Sat Oct 27, 2018 10:26 am
Forum: Lewis Structures
Topic: Drawing Lewis Structures with Charges
Replies: 6
Views: 138

Re: Drawing Lewis Structures with Charges

It is also important to note that when counting electrons, negative ions should have extra electrons placed in their Lewis structures and positive ions should have less electrons than the uncharged molecule. After the Lewis structure of the ion is written, place the entire structure in brackets, and...
by Sofia Ban
Sat Oct 27, 2018 10:23 am
Forum: Trends in The Periodic Table
Topic: Trends in the periodic table & electron configuration
Replies: 5
Views: 93

Re: Trends in the periodic table & electron configuration

There is definitely a relationship between trends and electron configurations. For example, as the period goes from left to right, the electron configuration changes so that more electrons are added to the levels. This reflects the increase in Ionization Energy, since IE increases going left to righ...
by Sofia Ban
Sat Oct 27, 2018 10:17 am
Forum: Lewis Structures
Topic: Exceptions to octet rule
Replies: 1
Views: 58

Re: Exceptions to octet rule

H and He are exceptions to the Octet Rule because for them, a full shell contains only 2 electrons (1s shell). Li and Be are metals, so they're likely to lose electrons, therefore becoming cations (Li+, Be2+). When this happens, they revert to the "noble gas" configuration of He, which is ...
by Sofia Ban
Thu Oct 18, 2018 12:16 pm
Forum: Quantum Numbers and The H-Atom
Topic: (6 Ed) Ch. 2 #29
Replies: 1
Views: 51

(6 Ed) Ch. 2 #29

#29 How many electrons can have the following quantum numbers in an atom? (a) n=2, l=1 (b)n=4, l=2, m1=-2 (c)n=2 (d)n=3 l=2 m1=+1

Thought I knew how to solve this question until I came upon the magnetic quantum number in (b). Can someone please explain what the question is asking and how to start it?
by Sofia Ban
Thu Oct 18, 2018 12:05 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: (6 Ed) Ch.1 #13
Replies: 2
Views: 59

(6 Ed) Ch.1 #13

I understand how to calculate the wavelength of radiation generated by the transition of n=1 to n=2, but how do you use this value to determine the series it belongs to and the color of light that will be emitted?
by Sofia Ban
Thu Oct 18, 2018 11:59 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Electron Configurations
Replies: 1
Views: 37

Electron Configurations

After doing a few of Chapter 2's homework problems, I have a couple questions: 1. What is the key difference between ground state and excited state and how does this change the electron configuration of that atom? 2. How do you obtain the magnetic quantum number from quantum number l or any other va...
by Sofia Ban
Sun Oct 14, 2018 8:25 pm
Forum: Properties of Light
Topic: 1A.3 7th Edition Question
Replies: 4
Views: 85

Re: 1A.3 7th Edition Question

As the frequency decreases, the waves broaden (wavelength increases). The extent of the change is the slope of the wave; therefore, the extent of the change also decreases.
by Sofia Ban
Sun Oct 14, 2018 7:22 pm
Forum: Properties of Light
Topic: Problem A9
Replies: 5
Views: 89

Re: Problem A9

First, use the equation c=wavelength x frequency(v). Rearrange this equation so that you are looking for the value of v, so v= c/wavelength. Then, convert nm to m. We know that the SI unit for nm is 1x10^-9m, so 2.5nm will be 2.5x10^-9m. Plug in this value as well as the speed of light constant (3.0...
by Sofia Ban
Sun Oct 14, 2018 7:01 pm
Forum: Properties of Electrons
Topic: Energy Q
Replies: 4
Views: 68

Re: Energy Q

It means that energy is only available in discrete (individual and separate) and small packets called quanta.
by Sofia Ban
Wed Oct 03, 2018 11:04 pm
Forum: Molarity, Solutions, Dilutions
Topic: Fundamentals E3- 7th Edition
Replies: 3
Views: 64

Re: Fundamentals E3- 7th Edition

In the visual, you see that there are a total of 9 Gallium atoms. Divide 9 by Avogadro's constant; this is the mole amount of Gallium on that balance. Multiply this number by 70 grams/mol (molar mass of Gallium) in order to find the mass of Gallium. Your value should come out to be 1.05x10^-21 Since...
by Sofia Ban
Wed Oct 03, 2018 10:26 pm
Forum: Molarity, Solutions, Dilutions
Topic: Determining the mass of salute for a given concentration
Replies: 1
Views: 61

Re: Determining the mass of salute for a given concentration

I believe you start by first converting the mL to L because Molarity uses the units mol/L. Since the Molarity and volume is given to you, you can find the amount in moles. After finding this value, find the molar mass of the pentahydrate and multiply this value with the mole amount. This should give...
by Sofia Ban
Wed Oct 03, 2018 10:13 pm
Forum: Empirical & Molecular Formulas
Topic: Molar Mass: E21
Replies: 3
Views: 118

Re: Molar Mass: E21

To find the amount (in moles), start by calculating the molar mass of the compound and then divide the given mass by this value. In order to find the number of molecules and formula units, multiply the mole amount by Avogadro's constant.

Go to advanced search