ELECTRONS!!! Parts of an atom. Electrons Negative charge Located outside the nucleus in an electron cloud They are organized into shells Move very quickly.

Slides:

Advertisements

Similar presentations

Atomic Structure. Key 11 Na Sodium Atomic Number Element symbol Element name Average atomic mass*

Advertisements

Bohr Model & Lewis Dot Diagrams

Drawing Bohr Models.

Catalyst: Find the atomic #, mass #, # protons, # electrons, and # neutrons for the following elements: Beryllium & Lithium.

The Chemistry of Life.

How to draw a (Bohr) model of an atom

Bohr-Rutherford Diagrams for Atoms

The Bohr Model Valence Electrons

Periodic Table How to use it…. ATOMIC NUMBER: The number of protons in the nucleus. It is the number of protons that identifies the element

Bohr Models are NOT Boring!

Ch. 2 - Atomic Structure I. Subatomic Particles II. The Periodic Table.

The Structure of an Atom

Bohr Models and Lewis Dot Structures. Recall that electrons are NOT in the nucleus of the atom! A VERY simple way to think about the positions of atoms.

The Bohr Model of the Atom Topic #6. EQ How can you identify an element based on the number of electrons and valence electrons?

Atom Practical Review. Name the subatomic particles? Protons, Neutron, and Electrons.

Both are valuable in a different way! Bohr Model & Lewis Dot Diagrams.

The Atom What is it made of???. Protons  Positively charged  Mass = 1 amu = 1.67 x grams  Located in the nucleus  Gives an atoms its identity.

Vocabulary ATOM-the smallest unit that maintains the characteristics of an element – Nucleus- The center of the atom, contains protons and neutrons –

Created by G.Baker Atom Models There are two models of the atoms we will be using in class. Bohr Model Lewis Dot Structure Created.

Structure of an Atom. What Is an Atom? An atom is often referred to as the building blocks of matter subatomic proton neutronelectron Atoms are composed.

The Structure of the Atom. Subatomic particles Subatomic particles are particles that are smaller than an atom Rutherford had predicted three subatomic.

What is the smallest unit of matter? An atom What is an atom made of? Subatomic particles protons (p + ) – positive charge neutrons (n) – no charge.

Atoms and the Periodic Table L.E.Q. What is matter?

Atomic Structure BASIC INFORMATION.

8 th Grade Physical Science Bohr Model & Lewis Dot Diagrams.

Electrons The negatively charged subatomic particle.

Matter- the stuff that makes up everything in the universe Element- A substance that cannot be broken down into other substances by chemical or physical.

Notes : The Bohr Model & Happy Atoms/Ions. What atom (element) do you think this is? How can you tell?

Vocabulary ATOM-the smallest unit that maintains the characteristics of an element – Nucleus- The center of the atom, contains protons and neutrons –

Timeline of Atomic Theory  Make sure it has Dates (some may not have dates) Important Peoples Names What they found/discovered/believed to be true The.

Bohr Model & Lewis Dot Diagrams

Valence Electrons Lewis Dot/Electron Dot Diagrams.

The Mighty Electron.

Bohr-Rutherford Diagrams for Neutral Atoms

Parts of an Atom Proton, Neutron & Electron Proton (p+)

Chemical Models of Elements Bundle 6: Periodic Table & Models Section.

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

4.3 Modern Atomic Theory Find the atomic #, mass #, # protons, # electrons, and # neutrons for Beryllium & Lithium.

Bohr Model Gallery.

Drawing the Atom.

Bohr Models. Why Bohr Models? 1.Bohr models are used to predict reactivity in elements. 2.Reactivity refers to how likely an element is to form a compound.

Part A: Atomic Structure

Bohr Model & Lewis Dot Diagrams

Elements & Atoms.

Topic #8: Bohr Models and Lewis dot Diagrams

Drawing Bohr Models.

Drawing Bohr Models.

Drawing Bohr Models.

Modern Atomic Theory.

Drawing Bohr Models.

Bohr-Rutherford Diagram

Drawing Bohr Models.

How to Draw Bohr Diagrams and

Drawing Bohr Models.

Bohr Model & Lewis Dot Diagrams

Review – Electron Energy Levels

Drawing Bohr Models.

Electron Arrangement and Bohr Diagrams

Drawing Bohr Models.

Drawing Bohr Models.

Get out your element flash cards and quiz your neighbor for 5 minutes.

#38 Bohr Model and Electronic Configuration

Electrons in outermost shell Bohr model or group number

#38 Electronic Configuration and Bohr Models

Drawing Bohr Models.

DRAWING BOHR MODELS.

Drawing Atoms Rutherford Bohr.

Warm-up Determine the amounts of protons, neutron and electrons for the following elements: Lithium Calcium Silicon Argon.

Presentation transcript:

ELECTRONS!!! Parts of an atom

Electrons Negative charge Located outside the nucleus in an electron cloud They are organized into shells Move very quickly – impossible to see where they are Scientists figured out where they ‘hang out’ Help create bonds between elements

Valence electrons are located in the outer shell or energy level. Helium He 2 2 Total Number of electrons = 2 Valence Electrons = 2

Valence electrons are located in the outer shell or energy level. Lithium Li Total Number of electrons = 3 Valence Electrons = 1

Sodium Na & 5. Atomic mass is the number of proton and neutrons 1. Electron configuration = 11 total electrons 3. Valence electrons & 8. Atomic number = the number of protons P: 11 N: 12

The Bohr Model – Aluminum (Al) 1. Determine the # of protons, neutrons, and electrons. P = 13 N = 14 e- = 13 (electron configuration: 2-8-3)

The Bohr Model – Aluminum (Al) Draw a circle for the nucleus – fill in the number of protons and neutrons P+ 13 N 14

The Bohr Model – Aluminum (Al) Draw first energy level, draw in a maximum of 2 electrons. P+ 13 N 14

The Bohr Model – Aluminum (Al) Draw second energy level, draw in a maximum of 8 electrons. P+ 13 N 14

The Bohr Model – Aluminum (Al) Draw third energy level, draw in a maximum of 8 electrons. P+ 13 N 14

Let’s Try One Together… Please draw the Bohr Model of Nitrogen (N)… Please draw the Bohr Model of Sodium (Na)…

The Lewis Structure Determine the amount of valence electrons using the periodic table’s electron configuration Draw a symbol for Aluminum and place the outer most energy level of electrons around it … Al

Let’s Try One Together… Please draw the Lewis Structure of Nitrogen (N)… Please draw the Lewis Structure of Sodium (Na)…