Transcript Chapter 11 The Periodic Table Part One

11/26 Bellwork
• Tell me the following information for the
elements Chromium (Cr) and Nickel (Ni):
• Atomic number=
• Atomic Mass number=
• Protons=
• Neutrons=
• Electrons=
• How many electrons go in the 1st shell? 2nd
shell?
3rd shell?
Chapter 11
The Periodic Table
Part One
Objective:
• Compare metals,
nonmetals, and
metalloids based on
their properties and their
location in the periodic
table.
• Elements are
classified as metals,
nonmetals, and
metalloids, by their
properties.
• The number of electrons
in the outer energy level
of an atom is one
characteristic that helps
determine which
category an element
belongs in.
• The zigzag line on the
periodic table can help
you recognize which
elements belong in
which category.
• Metals are found to the left
of the zigzag line. Atoms of
most metals have few
electrons in their outer
energy level.
• Most metals are shiny,
ductile, malleable, and are
good conductors of
electric current and
thermal energy.
• Nonmetals are found to the
right of the zigzag line. Atoms
of most nonmetals have an
almost complete set of
electrons in their outer
energy level.
• Nonmetals are not shiny,
ductile, or malleable, and are
poor conductors of electric
current and thermal energy.
• Metalloids are the elements
that border the zigzag line.
Atoms of metalloids have
about half of a complete set
of electrons in their outer
energy level.
• Metalloids have some
properties of metals and
some properties of
nonmetals. Metalloids are
also called semiconductors.
• Each Element is Identified
by a Chemical Symbol
Each square on the
periodic table includes an
element’s name, chemical
symbol, atomic number,
and atomic mass.
• For most elements, the
chemical symbol has one
or two letters. The newest
elements have temporary
three-letter symbols.
Objective
• Describe the difference
between a period and a
group.
• Each horizontal row of
elements is called a
period. The chemical and
physical properties of
elements in a row follow a
repeating pattern as you
move across the period.
• Each vertical column of
elements is called a group.
Elements in the same
group often have similar
chemical and physical
properties.
Mission
• Using these notes, write down as many
properties as you can about your element
for the 3-D Atom project at the bottom of
this note sheet. Use the information you
learned today about the periodic table,
and recall information we used last week
for drawing atoms. One piece of
information should be the drawing of
your element/atom. You only have 5
minutes to name as many properties as
possible!