All images are from www.Chem4kids.comwww.Chem4kids.com.

Slides:



Advertisements
Similar presentations
How to Draw Bohr Diagrams.
Advertisements

Valence Electrons & Lewis Dot Structure Unit 3.4 The Atom
Al Si Ne Li He P H Periodic Table Basics Be O Mg F Na N B C Cl
How to Draw Lewis Structures
5 th Grade Science Mrs. LaRosa All images are from
How to Draw Lewis Structures. Lewis Structures 1)Find your element on the periodic table. 2)Determine the number of valence electrons. 3)This is how many.
Periodic Table Study Guide 8 th Grade Mrs. Jenkins How to Draw Lewis Structures.
Periodic Table Study Guide
The Periodic Table. Periods Each row is called a “period” The elements in each period have the same number of shells
Atomic Number ● Symbol ● Atomic Weight Element ● Compound ● Mixture.
How to Draw Lewis Structures. Lewis Structures 1)Find your element on the periodic table. 2)Determine the number of valence electrons. 3)This is how many.
Bohr Models are NOT Boring!
OA How many protons, neutrons, and electrons are in an atom of chromium (Cr)?
Adapted from How to Draw Dot Diagrams or Lewis Structures.
Periodic Table Study Guide How to Draw Lewis Dot Structures.
Periodic Table Study Guide An explanation of how atoms can bond to each other How to Draw Lewis Structures.
Periodic Table Study Guide Mrs. Anderson How to Draw Lewis Structures.
Bohr Diagrams 1)Find your element on the periodic table. 2)Determine the number of electrons – it is the same as the atomic number. 3)This is how many.
Bohr Models are NOT Boring! Prepared by Mrs. Hunt with help from Mrs. LaRosa How to Draw Bohr Diagrams.
HELIUM ATOM + N N proton electron neutron Shell What do these particles consist of?
2/23/11 Objective: Determine the number of electrons of an atom using the periodic table Catalyst: 1.How can you determine the number of valence electrons.
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide How to Draw Lewis Structures.
Energy Levels and Bohr Model
Periods Each row is called a “period” The elements in each period have the same number of shells
All images are from Determining Shells & Valence Electrons.
Science Standard: Use the periodic table as a model to predict the properties of elements based on patterns of the electrons in the outermost energy level.
Atomic Structure Notes Continued Bohr Model - model that shows where particles are located in atoms. Valence electrons – outermost energy level (ring)
Warm Up: 9/22 (Back of NB) What are Bohr Models? How do you draw a Bohr Model? (use step-by-step instructions)
Periodic Table Study Guide 8 th Grade Science How to Draw Bohr Diagrams.
Bohr Diagrams 1)Find your element on the periodic table. 2)Determine the number of electrons – it is the same as the atomic number. 3)This is how many.
Periodic Table Study Guide How to Draw Lewis Structures.
How to Draw Bohr Diagrams and Lewis Dot Structures Al.
Interpreting Atomic Structure
How to Draw Lewis Dot Structures & Bonding. Lewis Structures 1)Find your element on the periodic table. 2)Determine the number of valence electrons. 3)This.
Ms. Stroup 8th Grade science
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide
GET THE PERIODIC TABLE YOU COLORED
Mrs. Sands 8th Grade science
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Notes Part 1 Created by Harris M. S.
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide
Periodic Table Study Guide
Periodic Table of Elements how it is arranged how it is used
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide
Periodic Table Study Guide
MT 2 Chemical Bonds How to Draw Lewis Dot Structures.
Periodic Table Study Guide
Periodic Table Study Guide
Periodic Table How to Draw Lewis Structures
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Determining Shells and Valence Electrons
Periodic Table Study Guide Determining Shells and Valence Electrons
Periodic Table Study Guide
Bohr Diagrams Find your element on the periodic table.
Periodic Table Study Guide Determining Shells and Valence Electrons
Presentation transcript:

All images are from

Atoms are arranged in the periodic table by atomic number Starting from left to right

An element’s identity is controlled by the number of protons An element’s chemical behavior and reactivity is controlled by the number of electrons and their placement in energy levels within the electron cloud that surrounds the nucleus

The energy levels for electrons in the electron cloud are called shells. Each shell can hold up to a certain number of electrons. 1 st shell holds up to 2 2 nd shell holds up to 8 3 rd shell holds up to 18

Periods Each row is called a “period” The elements in each period have the same number of shells

Groups Each column is called a “group” Each element in a group has the same number of electrons in their outer orbital, also known as “shells”. Except for He, it has 2 electrons The electrons in the outer shell are called “valence electrons”

Transition Metals Transition Metals have slightly different rules for shells and valence electrons. This is something you will learn about in High School Chemistry.

Determine the number of shells and the number of valence electrons for:

Determine the number of shells and the number of valence electrons for:

Helium is the exception in Group 8. Since it has just one shell, that shell can only fit 2 electrons instead of 8. It is in this group because all the elements have a full outer shell.

How to Draw Lewis Structures

Lewis Structures 1) Find your element on the periodic table. 2) Determine the number of valence electrons. 3) This is how many electrons you will draw.

Lewis Structures Find out which group (column) your element is in. This will tell you the number of valence electrons your element has. You will only draw the valence electrons.

Groups - Review Each column is called a “group” Each element in a group has the same number of electrons in their outer orbital, also known as “shells”. Except for He, it has 2 electrons The electrons in the outer shell are called “valence electrons”

Lewis Structures 1) Write the element symbol. 2) Carbon is in the 4 th group, so it has 4 valence electrons. 3) Starting at the right, draw 4 electrons, or dots, counter- clockwise around the element symbol.

Lewis Structures 1) Check your work. 2) Using your periodic table, check that Carbon is in the 4 th group. 3) You should have 4 total electrons, or dots, drawn in for Carbon.

Lewis Structures On your worksheet, try these elements on your own: a)H b)P c)Ca d)Ar e)Cl f)Al

Lewis Structures On your worksheet, try these elements on your own: a)H b)P c)Ca d)Ar e)Cl f)Al

Lewis Structures On your worksheet, try these elements on your own: a)H b)P c)Ca d)Ar e)Cl f)Al

Lewis Structures On your worksheet, try these elements on your own: a)H b)P c)Ca d)Ar e)Cl f)Al

Lewis Structures On your worksheet, try these elements on your own: a)H b)P c)Ca d)Ar e)Cl f)Al

Lewis Structures On your worksheet, try these elements on your own: a)H b)P c)Ca d)Ar e)Cl f)Al

Lewis Structures On your worksheet, try these elements on your own: a)H b)P c)Ca d)Ar e)Cl f)Al

Metals, Nonmetals, & Metalloids On many periodic tables, a jagged black line (see next slide) along the right side of the table separates the metals from the nonmetals. Metals are to the left of the line (except for hydrogen, which is a nonmetal) Nonmetals are to the right of the line, and Metalloids are the elements immediately adjacent to the line.

Metals, Nonmetals, & Metalloids