Electrons Valence Electrons Bohr Models Lewis Dot Structures.

Slides:

Advertisements

Similar presentations

An Eye on the Ion.

Advertisements

8 th Grade Science. Atomic Structure Atoms have a nucleus that contains Protons and Neutrons Electrons are contained in shells that surround the nucleus.

How do we Draw Atoms? Bohr Models Lewis Dot Diagrams.

Compounds Video Clip: Why it Matters. NOTES 2: VALENCE ELECTRONS, LEWIS DOT DIAGRAMS, AND OXIDATION NUMBERS.

Valence Electrons & Bohr Diagrams

Electrons and Ions Unit 3. Electron Energy Levels  What are electrons and where are they located?  Small negatively charged particles  Located in the.

The Nature of Chemical Bonds

Chemical Bonding.

Each column is called a “group”

AIM: How to write Lewis Dot Structures (Electron Dot Structures) DO NOW: 1. READ BOTH SIDES OF THE HANDOUT. 2. WRITE THE ELECTRON CONFIGURATION (ORBITAL.

Atoms and the Periodic Table. Atoms are the basic building blocks of all matter. Atoms are the basic building blocks of all matter. Atoms are made up.

Bohr Models, Valence and the Octet Rule

Why Atoms Combine? Intro to Bonding. Elements Made from only one type of atom. example: Oxygen (O 2 ) Helium (He)

Chapter 4.1 Atomic Theory. Atom Smallest particle of an element that has all the properties of that element Atomic theory is the study of the nature of.

Chemistry of Life Chapter 2. Warm Up 8/20 Try to recall the following information without referencing your textbook or a friend What is an atom? What.

Lewis Dot Notes. Lewis Dot Diagrams Illustrates the number of valence electrons – Valence electrons = Number of electrons in outer shell – Placed around.

Bohr Models and Lewis Dot Structures. Atoms ** Basic unit of matter Consists of: Electrons, Protons, & Neutrons.

What is oxidation number? What do those little +1, +2, -1, -2, etc. numbers mean?

When you hear/see the word “ATOM” you can always assume that it is referring to the element in it’s NEUTRAL state A NEUTRAL ATOM means that there are.

Chemical Bonds. Quick review: Lewis (electron)Dot A)What is a Lewis dot diagram A way to represent the potential reactivity of an atom without drawing.

SECTION 4: VALENCE ELECTRONS CHAPTER 9: ELECTRONS IN ATOMS AND THE PERIODIC TABLE.

AIM: How to write Lewis Dot Structures (Electron Dot Structures) DO NOW : 1. WRITE THE ELECTRON CONFIGURATION FOR THE PHOSPHORUS ATOM IN THE GROUND STATE.

Periodic Properties Chemical and physical properties of the elements change with their position in the periodic table.

Types of Bonding. There are two types of bonds: Ionic bonds Ionic bonds Covalent bonds Covalent bonds.

Gilbert Newton Lewis (surrounded by pairs of electrons) Lewis Dot Structures & Covalent Bonding.

Midterm Review Chapter 5 & 6 Covalent and Ionic Bonding.

The Mighty Electron.

Structure of an Atom.

IONS. Neutral Atoms: Review Neutral Atoms have the same number of PROTONS and ELECTRONS. Protons have a POSITIVE charge. + Electrons have a NEGATIVE charge.

VALENCE ELECTRONS AND IONS CHAPTER 5 CONTINUED. Subatomic Particle ChargeMassLocation in atom Other Information Protons+1 AMUnucleus# does not change.

Ions (Cations & Anions) Bohr Diagrams Lewis Dot Diagrams

Ionic Bonds and Compounds. The Octet Rule The Octet rule states that elements gain or lose electrons to attain an electron configuration of the nearest.

Ionic & Covalent Bonds.  A compound is a substance whose smallest unit is made up of atoms of more than one element bonded together.

Unit 1 Chemical Bonding: Ionic 1.3 What are ions and how do they form? AIM: How do ions form and why? DO NOW: Draw the Planetary Model of the following.

Understanding Atoms Atoms = smallest parts of matter Atoms have 3 main parts Protons (positive charge) Neutrons (no charge) Electrons (negative charge)

Vocabulary: 1. valence shell 2. valence electrons 3. anion 4. cation 5. isoelectric 6. Lewis structure (Lewis dot diagram) Banksy, British, 2002.

Electrons & their arrangement in an atom. Electrons live in something called energy levels. Only so many electrons can be in any energy level. The electrons.

Science 10 Lesson 2 BOHR MODELS + IONIC BONDING. Student Review  Draw a model for sulfur atom.

When an atom gains or loses electrons they become electrically charged particles called When an atom gains or loses electrons they become electrically.

1 Compounds and Their Bonds Octet Rule and Ions Copyright © 2005 by Pearson Education, Inc. Publishing as Benjamin Cummings.

Compounds and Noble Gases

2.3 Periodic Table and Atomic Theory

How to Draw Bohr Diagrams

Valence Electrons & Bohr Diagrams

Electron Configuration and Ion Formation

Valence Electrons & Bohr Diagrams

Putting Atoms Together

Created by G.Baker Elements & Atoms Created by G.Baker

Created by G.Baker Elements & Atoms Created by G.Baker

Section 4.1 Atoms and Ions.

Created by G.Baker Elements & Atoms Created by G.Baker

ELECTRON-DOT NOTATION

Valence Electrons & Bohr Diagrams

Valence Electrons & Bohr Diagrams

Bohr Model Bohr diagrams show how many electrons appear in each electron shell around an atom The first electron shell holds 2 electrons.

2.3 Periodic Table & Atomic Theory

Lewis Dot Structures & Covalent Bonding

Compounds Video Clip: Why it Matters.

Bohr and Lewis Diagrams

What You Know: Valence Electrons are the electrons in the highest occupied energy level of an atom You can tell the number of valence electrons from.

Bell work: Bohr Diagrams/ Lewis Dot Basics

Octet Rule & Ions Unit 1 Notes.

Valence Electrons & Bohr Diagrams

Electrons in outermost shell Bohr model or group number

AIM: How to write Lewis Dot Structures (Electron Dot Structures)

MT 2 Chemical Bonds Terms.

Valence Electrons & Bohr Diagrams

Presentation transcript:

Electrons Valence Electrons Bohr Models Lewis Dot Structures

Valence Electrons ► The electrons in the outer most electron shell are called valence electrons ► The number of valence electrons is the same as the group number

Valence Electrons ► Valence electrons are the electrons that are available for reactions with other elements. ► Octet Rule - For atoms to “be happy” they must gain, lose or share electrons until they have 8 valence electrons  This is why atoms bond – to be happy! ► An element with a full valence shell is a happy element ► An element with a full valence shell is a happy element  Noble gases are usually unreactive ► This is because they have full valence shells

4 Becoming An Ion ► Electrons are negatively charged ► Protons are positively charged ► Neutral atoms do not have a charge because the number of protons is the same as the number of electrons ► When atoms gain or lose electrons (to become happy) they become positively or negatively charged ► An atom with a charge is called an Ion

Common Charges of Ions ±

Bohr Models ► Niels Bohr created a visual model of the atom to make them easy to understand ► A Bohr Model contains a central nucleus surrounded by electron shells ► For each model you state the element in the nucleus and draw a dot on the electron shells for each electron

Lewis Dot Structures ► electron-dot structure – consists of element’s symbol surrounded by dots that represent the atom’s valence e –