×
Log in to StudySoup
Get Full Access to UNC - CHEM 251 - Class Notes - Week 1
Join StudySoup for FREE
Get Full Access to UNC - CHEM 251 - Class Notes - Week 1

Already have an account? Login here
×
Reset your password

UNC / Chemistry / CHEM 251 / What did Mendeleev discover?

What did Mendeleev discover?

What did Mendeleev discover?

Description

School: University of North Carolina - Chapel Hill
Department: Chemistry
Course: Intro to Inorganic Chemistry
Professor: Kathleen nevins
Term: Fall 2017
Tags: inorganic chemistry, Zeff, atomic orbitals, PeriodicTrends, electronconfiguration, and atomic orbital shapes
Cost: 25
Name: CHEM 251 Week 1 Notes
Description: Topics: - Orbital Structure - Electronic Configuration of Atoms and Ions - Periodic Trends and Explanations - Empirical Observations of Periodic Properties - Effective Nuclear CHarge (Zeff) - Predicting Zeff using Slater's Rules - Periodic Trends: Electronegativity, Ionization Energy, Electron Affinity, Atomic radius
Uploaded: 02/12/2017
8 Pages 220 Views 0 Unlocks
Reviews


.lst-kix_1gdggo2kzia-0 > li:before{content:"- "}.lst-kix_1gdggo2kzia-2 > li:before{content:"- "}.lst-kix_1gdggo2kzia-1 > li:before{content:"- "}ul.lst-kix_1gdggo2kzia-4{list-style-type:none}ul.lst-kix_1gdggo2kzia-3{list-style-type:none}ul.lst-kix_1gdggo2kzia-2{list-style-type:none}ul.lst-kix_1gdggo2kzia-1{list-style-type:none}.lst-kix_1gdggo2kzia-4 > li:before{content:"- "}ul.lst-kix_1gdggo2kzia-8{list-style-type:none}ul.lst-kix_1gdggo2kzia-7{list-style-type:none}ul.lst-kix_1gdggo2kzia-6{list-style-type:none}.lst-kix_1gdggo2kzia-3 > li:before{content:"- "}ul.lst-kix_1gdggo2kzia-5{list-style-type:none}.lst-kix_1gdggo2kzia-8 > li:before{content:"- "}ul.lst-kix_1gdggo2kzia-0{list-style-type:none}.lst-kix_1gdggo2kzia-5 > li:before{content:"- "}.lst-kix_1gdggo2kzia-6 > li:before{content:"- "}.lst-kix_1gdggo2kzia-7 > li:before{content:"- "}

Inorganic chemistry studies properties of molecules and MATERIALS using elements across the Periodic Table.If you want to learn more check out What is a substance with healthpromoting properties found in animal foods?

Applications; medicine, chemical Industry, Energy, TechnologyWe also discuss several other topics like the move toward access instead of ownership is a sign of collaborative consumption.

If you want to learn more check out Why there is an eating disorder epidemic?

Elements, Atomic structure, and the Periodic Table

PART I: Intro to the Periodic Table and Atomic StructureWe also discuss several other topics like What is the definition of a completing the square?

The Periodic Table

        • Henry Moseley - put the periodic table on a much firmer footing

  • He arranged the P.T. by the number of protons (which is the atomic number of the element)

        • Mendeleev - was the discoverer of the P.T, but his version was arranged in atomic We also discuss several other topics like What is the difference between parallel and series resistance?

mass.

If you want to learn more check out What connects the oxygen and hydrogen?

Group

    ↓

                

        Period →

        • Elements in the SAME Group tend to have similar properties

        • Elements in the SAME PERIOD tend to have different properties, but have Related

Orbital structure with different numbers of

        • Everything changes once elements are converted to ions, compounds, etc.

• Orbital Structure

• Electronic Configuration of Atoms and Ions

• Periodic Trends and Explanations

        > Empirical Observations of Periodic Properties

        > Effective Nuclear Charge (2eff)

        > Predicting 2eff using slaters Rules

The Periodic Table of Elements

TAKEAWAY:

   • the periodic table is not as static as it might seem

   • there are many different representations possible

   • elements are connected in many ways: Valence Shells, Physical Properties, etc.

NEED TO KNOW:

   • the relationships between elements: same group (↓)

                                             same period (→)

   • names of groups (Alkali metals, Pnictogens, Chalcogens, etc.)

   • classification of Regions (metals, non-metals, metalloids)

Reviewing the Atomic Structure

Bohr's Model

Chapter 1.1 Quantum Model and Quantum Numbers

Quantum Numbers

Size ←

L value:        0 1 2 3 ←

Orbital value:s p d f  ←

Shape ←

Direction ←

n = Principal quantum number

l = angular momentum quantum number

= magnetic quantum number

= spin quantum number

1 to ∞

0 - (n-1)

-l...0…+l

Shells

Sub-shells

(types of orbitals)

orbitals

(in a subshell)

Electron spin

(up/down)

                s                p                d                f

Orbitals:         1                3                5                7

                ↓                ↓                ↓

        Radial                1 angular        2 angular        

n =         1                2                                                3

        ↓             ↙               ↘n-1                                   ↙        ↓       ↘

l        0        0                1                                0        1        2

(n-1)        ↓        ↓            ↙        ↓      ↘                                ↙               ↙        ↓  ↘        ↓  ↘  ↘  ↘  ↘

        0        0        -1        0        +1                     0           -1        0  +1        -2 -1 0 +1 +2

        1s        2s                2p                            3s                3p                3d

                                                             1                3                5

🞻 n = 1: nly 1 orbital is possible

🞻 n = 2: exists → leading to  states and p orbital

🞻 n = 3:  is possible and the d-orbitals arise

Example:

Give the set of quantum numbers that describe the 4d orbitals:

Ans:

        

        

🞻 The Group (↓) reflects # of electrons in the shell

Page Expired
5off
It looks like your free minutes have expired! Lucky for you we have all the content you need, just sign up here