Alien Insect Periodic Table
Each pair has a set of alien insect pictures.
Please follow the procedure on pg 370-371.
Draw the missing pictures and answer “Analyze and
Conclude” questions 7-9 on pg 64 of your ISN.
Please write questions
7-9 in your notebook to
finish for homework if
you don’t get to them!
Do Now
Please write HW in your agenda
Please update your notebooks
Page # Title
71
Periodic Table Basics
72
Study Guide Guide
Date
12/02/14
12/02/14
Be prepared to discuss last night’s
homework!
Periodic Table
The periodic table is a chart of the
elements arranged into rows and
columns according to their physical
and chemical properties.
Elements are grouped together by
their similarities in properties and
trends.
Dimitri Mendeleev
Dimitri Mendeleev was a Russian
chemist who created the earliest
periodic table.
He arranged the elements in a list using their atomic
masses and found that the properties of the elements
repeated in a pattern.
He used this table to predict the properties of
elements that were not discovered yet.
Periodic means “repeating pattern.”
Periodic Table Basics
Rows on the periodic table are called periods.
Columns on the periodic table are called groups or
families or groups.
Each individual element has an atomic number. This
is the number of protons that the atom of this element
has.
As you move from left to right, and top to bottom, the
atomic number and the atomic mass increases.
The Periodic Table of Elements
Atomic number increases!
Atomic mass increases!
The Periodic Table of Elements
Atomic mass increases!
The Periodic Table of Elements
Number of valence electrons
Electrons in the outermost energy level!
Reading an Element’s Square
How do I find…
# of protons = atomic number
# of electrons = atomic number
*in a neutral atom*
# of neutrons = mass number
- atomic number
*round the mass number to the
nearest whole number*
Using the Periodic Table
Metals, Nonmetals, Metalloids
The Periodic Table
The periodic table is
sorted by similarities in
properties
There are three main
categories on the
periodic table: metals,
nonmetals, and
metalloids.
These categories are
broken up into smaller
families with more
specific properties.
(Alkali metals,
Halogens, Noble
Gases, etc.)
Today we’re going to
look at the 3 main
categories and the
properties that they
share.
Metals
Have luster (shiny)
Malleable and ductile
High densities and high melting points
Good conductors of electricity, but poor insulators
Most are solids
Examples of families: alkali metals and alkaline earth
metals are very reactive.
Nonmetals
Have no luster
Brittle
Good insulators, but poor
conductors of electricity
Most are gases
The elements that make up
life are nonmetals
(carbon, oxygen, hydrogen)
Examples of families:
− Halogens: Very reactive
− Noble gases: Nonreactive or
inert
Metalloids
Have properties of
metals and nonmetals
Semiconductors:
conducts electricity at
high temperature,
insulates at low
temperatures
Used in electronic
devices
Example: Silicon is the
most abundant
metalloid.
Foldable Cutouts
Open your textbooks to pg 348-349.
Fill in all atomic numbers and atomic masses
for each element on your sheet. Then, cut out
each element square.
Use the textbook to help you sort each element
in their correct category in your foldable(metal,
nonmetal, metalloid).