Search found 30 matches

by Abhi4F
Fri Dec 07, 2018 12:54 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 7
Views: 140

Re: Coordination Number

The coordination number is the number of ligands bonded to the central atom. The oxidation number is the charge on the transition metal in the coordination compound.
by Abhi4F
Fri Dec 07, 2018 12:49 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: How to tell if something is a chelate
Replies: 6
Views: 148

Re: How to tell if something is a chelate

A chelate forms when a plydentate ligands forms multiple coordinate covalent bonds with a central metal atom.
by Abhi4F
Sun Dec 02, 2018 4:39 pm
Forum: Hybridization
Topic: CH2O hybridization
Replies: 9
Views: 2480

Re: CH2O hybridization

Since CH2O is trigonal planar, there are three regions of electron density. Hence, there are 3 hybrid orbitals corresponding to sp2 hybridization.
by Abhi4F
Sun Dec 02, 2018 4:37 pm
Forum: Hybridization
Topic: 2s or s?
Replies: 7
Views: 129

Re: 2s or s?

The coefficent number in front represents the period the atom is in, while the S is refering to the orbital.
by Abhi4F
Sun Dec 02, 2018 4:35 pm
Forum: Hybridization
Topic: Hybridization Notation
Replies: 10
Views: 208

Re: Hybridization Notation

Both methods are correct
by Abhi4F
Sun Dec 02, 2018 4:30 pm
Forum: Hybridization
Topic: lone pairs
Replies: 20
Views: 313

Re: lone pairs

Yes, since lone pairs are a region of electron density it is taken into account for hybridization.
by Abhi4F
Sun Nov 25, 2018 12:29 am
Forum: Hybridization
Topic: Electron Density vs Shape?
Replies: 6
Views: 123

Re: Electron Density vs Shape?

Electron density refers to regions that have bonding electrons or lone pairs, which gives you the molecular orbital geometry. The VSEPR geometry only refers to the bonded electrons, or atoms.
by Abhi4F
Sun Nov 25, 2018 12:23 am
Forum: Hybridization
Topic: double bonds
Replies: 14
Views: 227

Re: double bonds

Single bonds consist of a sigma bond, double bonds consist of a sigma and a pi bond, and triple bonds consist of a sigma bond and two pi bonds.
by Abhi4F
Sun Nov 25, 2018 12:16 am
Forum: Hybridization
Topic: reason for hybridization
Replies: 9
Views: 246

Re: reason for hybridization

Since hybridized orbitals have less energy than unhybridized orbitals, it results in more stable compounds.
by Abhi4F
Wed Nov 14, 2018 7:18 pm
Forum: Lewis Structures
Topic: Formal Charge
Replies: 14
Views: 291

Re: Formal Charge

Generally, the more electronegative atoms have charges and the central atoms dont have charges for it to be most stable.
by Abhi4F
Wed Nov 14, 2018 7:12 pm
Forum: Lewis Structures
Topic: Expanded Octets
Replies: 9
Views: 224

Re: Expanded Octets

Any element in period 3 or below can have expanded octets as they can expand into the d-orbitals.
by Abhi4F
Wed Nov 14, 2018 7:11 pm
Forum: Lewis Structures
Topic: Boron Trifluoride
Replies: 8
Views: 173

Re: Boron Trifluoride

Boron is one of the exceptions to the octet rule.
by Abhi4F
Sun Nov 11, 2018 1:31 am
Forum: Bond Lengths & Energies
Topic: Bond Lengths
Replies: 5
Views: 261

Re: Bond Lengths

If you are given bond lengths, the smaller value is the double bond and the higher value is the single bond. If it is a resonance structure, you find the average of the values.
by Abhi4F
Sun Nov 11, 2018 1:29 am
Forum: Ionic & Covalent Bonds
Topic: Proportionality of bond strength
Replies: 3
Views: 190

Re: Proportionality of bond strength

Since electon repulsion increases as the number of bonds increase, the higher number of bonds will not be as effective at pairing as those with lower number of bonds, thus explaining why lower number of bonds have higher strength and require more energy to break.
by Abhi4F
Sun Nov 11, 2018 1:22 am
Forum: Ionic & Covalent Bonds
Topic: delta positive delta negative
Replies: 15
Views: 377

Re: delta positive delta negative

The more elctronegative atom accepts electrons so it is more negatively charged, hence delta negative. The atom that donates the elctrons becomes positively charged, or delta positive.
by Abhi4F
Sun Nov 04, 2018 6:48 pm
Forum: Photoelectric Effect
Topic: Work Function
Replies: 14
Views: 626

Re: Work Function

Using the equation, Energy of photon = work function + kinetic energy, you can solve for work function given the other variables.
by Abhi4F
Sun Nov 04, 2018 6:46 pm
Forum: Lewis Structures
Topic: Lewis Structures
Replies: 11
Views: 176

Re: Lewis Structures

The atom with the lowest ionization energy is the central atom.
by Abhi4F
Sun Nov 04, 2018 6:42 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 4
Views: 99

Re: Electronegativity

Yes electronegativy and electron affinity both increase across due to a stronger nuclear attraction and decrease down as the number of shells increase making electrons further away from the nucleus.
by Abhi4F
Sun Oct 28, 2018 11:41 pm
Forum: Properties of Light
Topic: Electromagnetic Spectrum
Replies: 5
Views: 188

Re: Electromagnetic Spectrum

The EM spectrum regions should be known, but it is not neccesary to know each range of values. From highest energy (shortest wavelength) to lowest energy (highest wavelength), the spectrum is as follows: gamma rays, x-rays, ultraviolet light, visible light, infrared rays, microwaves, radio waves.
by Abhi4F
Sun Oct 28, 2018 11:34 pm
Forum: Properties of Light
Topic: Photoelectric Effect
Replies: 8
Views: 257

Re: Photoelectric Effect

The photoelectric effect is the emission of electrons from the radiation of a light that is greater than the threshold energy. It showed that intensity does not affect the ejection of light, but that one photon interacts with one electron.
by Abhi4F
Sun Oct 28, 2018 11:32 pm
Forum: Properties of Light
Topic: Is light in waves or photons?
Replies: 10
Views: 275

Re: Is light in waves or photons?

Light has properties of waves as displayed in diffraction patterns that are shown when light passes through a crystal and particles as seen in the photoelectric effect.
by Abhi4F
Sun Oct 21, 2018 3:21 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Schrodinger's Wave Function
Replies: 10
Views: 191

Re: Schrodinger's Wave Function

No you do not need to calculations of the equation as it is advanced math, but know the conceptual implications of the equation regarding orbitals and wave functions
by Abhi4F
Sun Oct 21, 2018 3:00 pm
Forum: Properties of Electrons
Topic: Wavelength Calculations
Replies: 5
Views: 140

Re: Wavelength Calculations

When we combine the equations E=hv and c=λv, we get E=hc/λ. Hence, we get the constants, h, Planck's constant (6.626x10^-34Js) multiplied by c, the speed of light (3.00x10^8 m/s).
by Abhi4F
Sun Oct 21, 2018 2:25 pm
Forum: Properties of Light
Topic: Calculating the wavelength of light
Replies: 7
Views: 149

Re: Calculating the wavelength of light

Both options are correct and can be used on the exam, but 2.998 x 10^8 will be more precise.
by Abhi4F
Sun Oct 14, 2018 3:49 pm
Forum: Balancing Chemical Reactions
Topic: Mole Coefficients in Chemical Equations
Replies: 6
Views: 354

Re: Mole Coefficients in Chemical Equations

While the mole coefficients may not be equal, this does not mean the equation is not balanced. Balancing equations deals with the same number of atoms/elements on the reactant and product side.
by Abhi4F
Sat Oct 13, 2018 11:11 pm
Forum: Empirical & Molecular Formulas
Topic: Going from empirical to Molecular formula
Replies: 14
Views: 669

Re: Going from empirical to Molecular formula

The value should be close to a whole number or if not very close so you can round to one.
by Abhi4F
Sat Oct 13, 2018 11:02 pm
Forum: Properties of Light
Topic: E=hv
Replies: 13
Views: 249

Re: E=hv

In this equation, E is the energy of light (photons) in Joules.
by Abhi4F
Thu Oct 04, 2018 1:22 am
Forum: Balancing Chemical Reactions
Topic: Balancing reactions tips
Replies: 29
Views: 883

Re: Balancing reactions tips

I tend to find the element that occurs the least and balancing from there as it makes the process way easier.
by Abhi4F
Thu Oct 04, 2018 1:07 am
Forum: Molarity, Solutions, Dilutions
Topic: molarity conversion
Replies: 7
Views: 143

Re: molarity conversion

Yes, since molarity is expressed in moles/liter, ml should be changed to L to express the answer in the right units
by Abhi4F
Wed Oct 03, 2018 11:29 pm
Forum: Empirical & Molecular Formulas
Topic: Definition of Empirical Formula
Replies: 8
Views: 212

Re: Definition of Empirical Formula

The empirical formula represents the most basic ratio of atoms in the formula.

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