## Search found 18 matches

Sun May 20, 2018 11:54 pm
Forum: Ionic & Covalent Bonds
Topic: Formal Charge
Replies: 3
Views: 152

### Re: Formal Charge

I would use the equation given to us in class since that will be the one we will be using. Also I think it's easier to understand than the equation you learned in that video.
Sun May 20, 2018 11:51 pm
Forum: Octet Exceptions
Topic: Expanded Valence Shells
Replies: 1
Views: 149

### Re: Expanded Valence Shells

The expanded valence electron always applied to the central atom because the larger the central atom, the larger the number of electrons which can surround it. Also I believe if there are two central atoms you wouldn't need an expanded octet but someone may correct me on this.
Sun May 20, 2018 11:38 pm
Forum: Lewis Structures
Topic: Lewis Dot vs Lewis Structure
Replies: 3
Views: 153

### Re: Lewis Dot vs Lewis Structure

I believe that the Lewis dot symbol is used for to show the valence electrons of atoms while the Lewis structure shows the connectivity of atoms within a molecule.
Sun May 06, 2018 11:07 pm
Forum: Properties of Light
Topic: Test 2 Question 4
Replies: 8
Views: 305

### Test 2 Question 4

A cotton ball soaked in KCL is lit on fire. The flame is a violet color (λ=400 nm). A scientist claims that the color arises from the transition of an electron from its excited state to its ground state. What is the difference in energy between these two states? I know I use the equation E=hc/λ but ...
Sun May 06, 2018 10:15 pm
Forum: Properties of Light
Topic: Question on excited atoms emitting light and Neon signs
Replies: 2
Views: 182

### Re: Question on excited atoms emitting light and Neon signs

This is really a interesting topic actually so I decided to research and this is what I found. Gases at atmospheric pressure are not good conductors of electricity. So, to pass a current through a gas requires a gas-discharge tube, which is a glass tube with two electrodes sealed through its walls.....
Sun May 06, 2018 9:58 pm
Forum: Molarity, Solutions, Dilutions
Topic: Test #1 Question 1 part B
Replies: 1
Views: 217

### Re: Test #1 Question 1 part B

You would take the mols of the sodium ions and divide it by the total volume. And the mols of the sodium ions include the mols of sodium ions from the sodium carbonate and the mols from the sodium chloride. The total volue would be 2.00 L because it was first dissolved in 1L of water and the 1L of s...
Sun Apr 29, 2018 11:59 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Difference between orbitals
Replies: 4
Views: 130

### Re: Difference between orbitals

The number denotes the energy level of the electron in the orbital. The letter refers to the shape of the orbital.
Sun Apr 29, 2018 11:55 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Defining Wavefunction
Replies: 1
Views: 80

### Re: Defining Wavefunction

A wavefunction is a solution of the Schrodinger equation. This equation is a mathematical function with values that vary with position because particles do not move along precise trajectories. So you would obtain a trajectory, showing the path something would follow, which is the wavefunction. So it...
Sun Apr 29, 2018 11:32 pm
Forum: Trends in The Periodic Table
Topic: atomic mass
Replies: 3
Views: 107

### Re: atomic mass

Elements on the periodic table are arranged from left to right and top to bottom in order of increasing atomic number which also correlates with increasing atomic mass.
Sun Apr 22, 2018 11:53 pm
Forum: Properties of Light
Topic: Equations [ENDORSED]
Replies: 1
Views: 106

### Re: Equations[ENDORSED]

Some equations only work for hydrogen atoms because that's what the scientist based their model off. Bohr's model works for only hydrogen atoms because this model assumes that electrons are independent, but this is not the case. Electrons will repel each other upon potential collisions and Bohr's mo...
Sun Apr 22, 2018 11:41 pm
Topic: Temperature relates to brightness?
Replies: 2
Views: 405

### Re: Temperature relates to brightness?

These three terms do not mean the same thing. Intensity means the measurable amount of a property. Brightness is when a source appears to be radiating or reflecting light. Temperature is the degree of heat present in an object. Brightness and temperature are properties and intensity is how much of t...
Sun Apr 22, 2018 11:31 pm
Forum: Properties of Light
Topic: Amplitude and Intensity
Replies: 6
Views: 263

### Re: Amplitude and Intensity

Light is also known as visible radiation and it is the electromagnetic radiation that can be detected by the human eye. Intensity is the brightness of that electromagnetic radiation. So intensity is a property of light.
Sun Apr 15, 2018 2:13 pm
Forum: Properties of Light
Topic: Properties of Light [ENDORSED]
Replies: 5
Views: 220

### Re: Properties of Light[ENDORSED]

A photon is a particle representing a quantum of light or other electromagnetic radiation. I believe the concept is that light shares characteristics of acting as a wave and as a particle. Photons experience refraction like a wave but it also contains a fixed energy like a particle. I hope this hel...
Sun Apr 15, 2018 1:50 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Bohr Frequency Condition [ENDORSED]
Replies: 2
Views: 163

### Re: Bohr Frequency Condition[ENDORSED]

Bohr's frequency condition represents the relationship between the change in energy of an atom (or molecule) and the frequency of radiation emitted (or absorbed). Niels Bohr suggested that electrons energy levels were discrete and separated in stable orbits around the nucleus (like our solar system'...
Sun Apr 15, 2018 1:25 pm
Forum: Properties of Light
Topic: Properties of Light [ENDORSED]
Replies: 5
Views: 220

### Re: Properties of Light[ENDORSED]

A photon is a particle representing a quantum of light or other electromagnetic radiation. I believe the concept is that light shares characteristics of acting as a wave and as a particle. Photons experience refraction like a wave but it also contains a fixed energy like a particle. I hope this help...
Sat Apr 14, 2018 11:59 pm
Forum: Photoelectric Effect
Topic: Dividing by Avogadro's constant [ENDORSED]
Replies: 2
Views: 89

### Re: Dividing by Avogadro's constant[ENDORSED]

I believe what your referring to is the work function, kJ/mol. To cancel out the mol you would use Avogadro's constant.
Sat Apr 14, 2018 11:21 pm
Forum: Properties of Light
Topic: Frequency and wavelength [ENDORSED]
Replies: 4
Views: 184

### Re: Frequency and wavelength[ENDORSED]

Inverse relationship means that two variables move in opposite directions. For example as A increases, B decreases and vice-versa. The same goes for wavelength and frequency. If a wave model has a high frequency it will have a shorter wavelength because higher frequency means there are a higher amou...
Sat Apr 14, 2018 11:03 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Chemical Equations and Combustion
Replies: 7
Views: 390

### Balancing Chemical Equations and Combustion

If you are told to balance a chemical equation that has went through combustion and the reactants are given but not the products then what do you do?