Question

Hey guys will you help me study for an exam?

Answer 1

Lesson 02.01: Early Chemistry and Atomic Structure
• Describe the changes in the atomic model over time.
• Explain how different observations and experiments led to changes in the atomic model.


Lesson 02.02: Properties of the Atom
• Describe the properties and locations of protons, neutrons, and electrons in an atom.
• Explain what the mass number and atomic number identify about an atom.
• Use mass and atomic number to determine the number of each subatomic particle in an atom.


Lesson 02.03: Isotopes and Weighted Averages
• Identify the differences between isotopes of an element.
• Calculate the weighted average mass of an element when given the percent abundance and mass of its isotopes.


Lesson 02.04: The Mole and Conversions
• Describe the mole and its use in chemistry calculations.
• Use the mole, Avogadro’s number, and molar mass in dimensional analysis calculations.


Lesson 02.05: Electron Arrangement and Electromagnetic Radiation
• Describe observations that led to the Bohr and quantum models of the atom.
• Explain how line spectra are used to identify elements and what they indicate about atoms.
• Explain properties of waves and how these properties apply to the quantum model.
• Describe your observations, calculations, and conclusions from the virtual lab.



Lesson 02.06: Electron Configurations
• Represent electron arrangements using electron configuration, orbital notation, shorthand notation, and Lewis dot notation.
• Describe the quantum model of an atom in terms of energy levels, sublevels, and orbitals.
• Use quantum numbers to represent the locations of electrons. (honors)
• Apply the rules and limitations of each quantum number to identify possible and impossible quantum number sets. (honors)

Answer 2

I have to do a dba a at 3:30

Answer 3

whoa 1 question at a time...

Answer 4

Thats all the things it covers so i just put it out there so anyone could answer on the topic they know

Answer 5

well that's not how it works here. The majority of people on OpenStudy will ignore this question because it's way too long. Post 1 question at a time and you'll get help much faster.

Answer 6

Many similar questions with answer to is also floating around on OS. (damn shame you can't look up old answers form time to time)

Answer 7

@Frostbite you can... Just search on google and add "site:openstudy.com"

Answer 8

Yea I can't even find some of the old answers I made my self using that method.

Answer 9

Oh well. @kaylarocks if you do as Thomaster suggest, then you can count on me.

Answer 10

Alrighty

Answer 11

We can start with the first one:

Describe the changes in the atomic model over time.
The existence of atoms began to be accepted around 1910 when many theories called upon the fact that atoms most exist (for example the work of Boltzmann trying to explain entropy, died 1906).
At that time atoms were seen as tiny small ball like objects, all matter was composed of. the models have been advanced ever since. Key names that are worth looking up are J. J. Thomson, Rutherford, Bohr and de Broglie.



Explain how different observations and experiments led to changes in the atomic model.
Many of the models that the men above proposed were created upon what they saw from their experiments. An example is that Niels Bohr wanted to explain the spectral lines in hydrogen, introducing the energy shells are quantized.

de Broglie saw that we could calculate wavelengths for particles with a certain velocity, introducing the particle wave duality.

Rutherford suggested that electrons are orbiting the nucleus like planets.


Thomson that there was a "electronsness" surrounding a positive core.

They can all be explain more deeply, but this is just introductory.

Answer 12

Very crappy written of me sorry.

Answer 13

Thank you Frostbite