Name ______

CHAPTER 19

“Properties of Atoms & the Periodic Table”

Section 3 – The Periodic Table

I. Organizing the Elements

A) ______Table - the elements are arranged by increasing atomic number and by

changes in physical and chemical properties

1) ______- repeated in a pattern

2) First developed by ______(late 1800’s)

  • Russian Chemist
  • Arranged the elements in increasing atomic ______
  • He had to leave blank spaces in his periodic table to keep the elements properly lined according to their chemical properties.
  • Scientists later discovered these missing elements

3) In 1913, Henry G.J. ______arranged the elements by increasing atomic #

II. Structure of the Periodic Table:

A) ______of elements (also called “Families”)

1) ______columns

2) Contain the same number of ______electrons (e- located in the outermost

energy level)

  • ______Rule – atoms are stable when they contain 8, 18 or fill their outermost energy level

3) Family Traits:

Family # / Family Name / # of valence e-
Family 1
Family 2
Families 3-12
Family 13
Family 14
Family 15
Family 16
Family 17
Family 18

B) ______of elements

1)______rows

2)Notice the zig-zag line:

  • ______ located to the left of the line
  • ______ located to the right of the line
  • ______ touching the line
  • Rare-______Elements (Lanthanides and Actinides)

III.The Law of Periodicity

•When the elements are arranged in order of increasing atomic number, the properties repeat at “regular” intervals.

•Looking at the periodic table, this means that all of the elements in a given column have similar chemical properties.

IV Characteristics of Metals, Non-Metals and Metalloids

A)Properties of Metals

  1. Good conductors of ______and ______
  2. Shiny
  3. ______and ______

B)Properties of Metalloids

  1. Have properties of both ______and ______

C)Properties of Non-Metals

  1. Non-metals are poor conductors of heat and electricity.
  2. ______non-metals are brittle and break easily.
  3. Many non-metals are gases.

V. Periodic Table Diagrams

A) Electron ______Diagrams

1)Uses the symbol of the element and dots to represent the electrons in the outer energy level

B) ______Diagrams

1)Shows the arrangement of electrons in each energy level

  1. How to make Bohr diagrams
  1. How to Make Electron Dot Diagrams

I Can Checklist

Ch 19 Properties of Atoms and Periodic Table

Section 3

Section 3 The Periodic Table

I can identify examples of periodic trends.

I can explain the arrangement of elements in the modern Periodic Table.

I can describe the characteristics of

  • Metals
  • Non-metals
  • Metalloids

I can explain GROUPSof the periodic table.

I can explain PERIODS of the periodic table.

I can discuss why similar elements are placed in the same group.

I can explain the Law of Periodicity.

I can analyze a periodic table and use the table to locate information concerning

  • Atomic mass
  • Atomic number
  • Protons
  • Neutrons
  • Electrons
  • Group numbers
  • Period numbers
  • States of Matter

I can locate electrons of an element in the proper energy levels.

I can construct an ELECTRON DOT DIAGRAM

I can construct a Bohr diagram

“The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.”

Dmitry Ivanovich Mendeleev (1834-1907)