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Protons, Neutrons, and Electrons Practice Worksheet - PowerPoint

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Protons, Neutrons, and Electrons Practice Worksheet - PowerPoint Powered By Docstoc
					What about the periodic table of
         elements?
 You  will learn about the organization of
  the periodic table, how to read and
  interpret the elements and how to
  determine how many protons,
  neutrons, and electrons will be in each
  atom.
 Also, you will learn some study skills to
  help guide you with your homework
  and preparation for tests.
An introduction…….

 The element song
Periodic Table- A table which
organizes chemical elements




              www.chem.queensu.ca/.../Periodic_table.gif
   Families/Groups- The vertical columns in
    periodic table. Each member shares similar
    chemical properties.




   Periods- The horizontal row in the periodic
    table. Each member contains the same
    number of electron clouds.

       Arranged in order of increasing atomic number
Periods   Families or Groups




                    www.chem.queensu.ca/.../Periodic_table.gif
     Light      metals
   Example: Magnesium


 Heavy           Metals
           Example: Iron


     Nonmetals
       Example: Carbon


     Inert      Gases
       Example: Helium
Light                                                         Inert
         Heavy Metals
Metals                                    Nonmetals           gases




                        www.chem.queensu.ca/.../Periodic_table.gif
An Element
(A substance consisting of a
        single atom)




                               The periodic
                               table consists
                               of many
                               elements.
 EachELEMENT has it’s own properties
 such as :
     Boiling point
     Melting point
     Color
     Etc…

  For further information about an element 

               www.webelements.com
                        Or
               www.dayah.com/periodic
 Atom   – Smallest particle of an element

 Nucleus – Central region of an atom
 that contains the protons and neutrons
 of an atom. Holds the most weight but
 is very small in size.

 Proton – A subatomic particle located
 in the nucleus with a positive charge.
 Neutron– A subatomic particle located
 in the nucleus with a neutral charge.

 Electron– A subatomic particle that
 spins around an atom’s nucleus in
 orbits called shells with a negative
 charge.

 Electron cloud – Region of negative
 charge surrounding an atomic nucleus
 that is associated with an atomic
 orbital.
Atom


electron

           Proton

             Neutron




             www.thinkgeek.com/images/products/additional/large/periodic_magents_close.jpg
Atom
                        Neutrons

Electrons              Protons




                                   Nucleus




            Electron clouds
 Chemical  Symbol - Abbreviation given
  to the names of the element
 Atomic number - number of protons
  contained in an atom. Used to
  name/identify an atom
 Atomic weight – Average weight of the
  protons and neutrons of an atom
             8                Found on

                 O
                 Oxygen
                             the periodic
                                 table

                  16
                                                             Atomic Number =
                                                             number of protons

                                                             Atomic Weight =
                                                             number of protons + number of neutrons

                                                             Protons =
                                                             Number of electrons




//village.wsfcs.k12.nc.us/lv/hswest/hp.nsf/Files/potassium
6/$File/atomic+number.bmp
 How  can we determine the number of
 neutrons of a particular element from
 the information given on the periodic
 table?


                              www.nrc.gov/reading-rm/basic-
                               ref/students/images/ask.gif
  Atomic weight (or mass) =
     number of protons +
        number of neutrons
                 Atomic Weight =
                 number of protons +
19               number of neutrons


     K
     Potassium
                  39.0938 = 19 + neutrons
                  -19       -19
                  20.0938 neutrons

                 There cannot be 0.0928 of a
 39.0938         neutron, so this number is rounded
                 to 20   neutrons.
Potassium



               20 neutrons

                19 protons




            19 electrons
 Practice, Practice, Practice!!
To help you understand the periodic table
 and the math associated with it, check out
               this website:
         Questions and Answers

   Lets play a game to help you learn!
          Element Math Game
HOMEWORK !!!
Read Chapter 2 in the Chemistry
Text book and do this worksheet.

        NO worries…..
 Here is some help……………
 Identifying Key Concepts
•EXAMINE the text structure for any
elements that the writer may have used
to indicate major division in the subject
matter.
   •Bold headings
   •Subtitles
   •Graphs
   •Visuals
   •Summaries
•DETERMINE which sentence in a
paragraph is the topic sentence
   •Often the first sentence
   LEARN to identify statements that “forecast”
    key concepts and RECOGNIZE that
    transitions may sometimes help to identify a
    key concept.
      Is this an introduction into a key concept?




   EXAMINE the summary statements in the
    paragraphs and/or the conclusions that
    summarize each section of the reading.
          Will help with condensing the key

           concepts.
Audience:
7-8 grade general science chemistry students

Objectives:
Given an element, the students will be able to determine its atomic mass, atomic
number, number of protons, number of neutrons, and number of electrons with
90% accuracy.

Given an element, the student will be able to determine if it is a light metal, heavy
metal, nonmetal, or gas and know the period and family it is in by using the period
table with 90% accuracy.

Given a diagram of an atom, the students will be able to determine which element
it is by observing the number of electrons, protons, and neutrons by using the
periodic table with 90% accuracy.

Assessment
I will use a website which has a game on it involving the math of the periodic table
to determine the class’s understanding of the elements.

A worksheet will be given to the students that will be filled out after reading
chapter two in the text which involves concepts that were discussed today.

				
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