Objective: describe how the
elements are arranged in the
periodic table
December 8
Do Now: try to solve the elemental
puns (NEXT slide)…make sure to
write down your answers on your do
now sheet! *Take out your periodic
table!
Homework: watch video and
complete Google form
Use the pun to help you identify the element.
Give the element’s name and symbol.
1.Superman’s weakness
2.A person who sells furs
3.Thanksgiving guests
4.Mickey’s pal
5. What you do to catch a horse
The answers are …
1.Superman’s weakness Krypton - Kr
2.A person who sells furs
3.Thanksgiving guests
4.Mickey’s pal
Sulfur - S
Indium - In
Plutonium - Pu
5. What you do to catch a horse Europium - Eu
The Periodic Table
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Think of all the ways a deck of cards
could be laid out so that the cards form
some sort of identifiable pattern, write
as many of the patterns as you can.
Dmitri Mendeleev also looked for a
pattern among the elements. He looked
at their properties, including density,
mass, appearance, melting point, etc.
He realized there was a pattern when
the elements were arranged in order of
increasing mass.
Here is a “periodic” table. What is it?
The columns are called “GROUPS” or families.
What is represented by the groups on this periodic table? DAYS
The rows are “PERIODS”.
What information is in the horizontal periods? WEEKS
Certain information is missing.
How would you find the missing data?
Group 5
Period 3
?
?
Periodic - What does it mean?
A regular repeating pattern.
What are some examples?
Days of the week, the months of the
year, the numbers on the clock.
The pattern was so strong that
Mendeleev realized there were
missing elements that had not yet
been discovered.
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The Periodic Law
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It states that the chemical
and physical properties of
elements are periodic or
repeating functions of their
atomic numbers.
The Periodic Table
Important Facts
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The columns are called groups or
families and have similar chemical
and physical properties.
The rows are called periods because
the properties in a row follow a
repeating pattern.(ex. less metallic
from left to right)
The elements are classified as metals,
nonmetals and metalloids. There is
a “staircase” on the table that can help
you recognize which elements are
which.