Download Periodic Table Workbook NOTES

Date:
Topic/Objective:
The Periodic Table
Essential Question: How are the elements arranged on the periodic table?
Questions:
What are elements? Pure substances made up of 1 type of atom.
How are the elements organized?
Periodic Table of Elements:
 Demitri Mendeleev – 1st organized the elements in order of atomic mass
 Henry Moseley – Improved the periodic table by arranging the elements by
the # of protons, or atomic number.
The Periodic Table of the Elements
How are the elements arranged on the periodic table?
Metals, Nonmetals and Metalloids
Metals – elements that are shiny and conduct heat and electricity well, mostly solid at
room temp., are malleable (able to be formed into different shapes, are ductile (able
to be made into wires).
Nonmetals – poor conductors of heat and electricity, often dull and brittle
Metalloids – have properties of some metals and some nonmetals.
Elements in Each Column Have Similar Properties
Groups – The 18 Columns on the periodic table – Elements in the same group have
similar physical and chemical properties (also called a family)
- Atoms of elements in the same group have the same # of Valence electrons
(electrons on the outermost energy level of the atom)
- Valence electrons determine the chemical properties of the atom including
reactivity.
Elements in Each Row Follow Periodic Trends
Periods – The 7 horizontal rows on the periodic table – Elements in the same period
have the same # of energy levels/orbitals of electrons and follow periodic trends
Elements Are Arranged in Order of Increasing Atomic # (# of protons)
Summary: