Transcript Notes About the Per Table (1st Part)

Instructions
SPI
0807.9.9
1)Notes
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Periodic Table
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Objective:
advance through this presentation.
Use the periodic table to determine the properties
of an element.
Check for Understanding
Identify the atomic number, atomic mass, number of
protons, neutrons, and electrons in atoms using the
periodic table.
Essential Question
How do I use the periodic table to determine the
atomic number, the atomic mass, the number of
sub-atomic particles, & other properties in an atom?
We use a chart to organize elements called…
The Periodic Table
 Currently scientists believe there are only 98 naturally occurring
elements in the universe (Reference link: Chemistry Website
We have also created 20 man-made elements for a total of 118
Notes
SPI 0807.9.9
Periodic Table
Science
Periodic table
 Is a chart of all known chemical elements
 Displays the different types of atoms (called elements)
Purpose
 Is a tool used to quickly locate a variety of information
about a particular element
How is it organized




Organized into rows called periods
Organized into columns called groups (also called families)
Arranged in numerical order by the atomic number
Also arranged other ways (metals, nonmetals, metalloids, etc)
Notes
.
SPI 0807.9.9
Periodic Table
Science
Info in each square
Atomic number
 is the number of protons!
 also matches the number
of electrons!
Chemical symbol
Element name
Atomic mass
 Is the average mass of a
sample of hydrogen atoms
1
H
Hydrogen
1.0
Notes
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SPI 0807.9.9
Periodic Table
Science
How to determine the number of neutrons
Two Simple Steps:
Atomic Number
1) Round the atomic mass to the
nearest whole number
Example: 6.941 rounds to 7
2) Subtract the atomic number
from this rounded number
Atomic Mass
Reminder: Atomic number is 3
Example: 7 - 3 = 4 neutrons
3
Li
Lithium
6.941
Review
.
SPI 0807.9.9
Periodic Table
Science
Answer these questions on your paper
(1) What are elements?
Elements are the different types of atoms
(2) What are the rows and columns called?
Rows are periods & columns are groups or families
(3) Describe 3 ways the periodic table is organized.
…organized in rows (periods) according to the atomic number.
…organized in columns (families) according to similarities
…organized into metals, nonmetals, and metalloids
(4) What is an atomic number?
It is the number of protons in an atom
(5) What is atomic mass?
It is the average mass of a sample of the same kind of atoms
Review
.
SPI 0807.9.9
Periodic Table
Science
Write down your answers
What is oxygen's atomic number and atomic mass?
Atomic Number
8
O
Oxygen
Atomic Mass
16.0
SPI 0807.9.9
Periodic Table
Review
.
Science
Write down your answers
How many protons and electrons does each atom of
oxygen have?
Atomic Number
…has 8
protons
8
O
Oxygen
16.0
…also has
8 electrons
Notes
.
SPI 0807.9.9
Periodic Table
Science
Write down your answers
How many neutrons does each atom of oxygen have?
Two Simple Steps:
1) Round the atomic mass to the
Atomic Number
nearest whole number
Example: 16.0 rounds to 16
2) Subtract the atomic number
from this rounded number
Reminder: Atomic number is 8
Example: 16 - 8 = 8 neutrons Atomic Mass
8
O
Oxygen
16.0
Questions
SPI 0807.9.9
Periodic Table
Science
Periodic Table-Question
Here is an example of a question you might see on a quiz or test.
Questions
SPI 0807.9.9
Periodic Table
Science
Periodic Table-Question
Here is an example of a question you might see on a quiz or test.
Questions
SPI 0807.9.9
Periodic Table
Science
Periodic Table-Question Here is an example of a question.
Questions
SPI 0807.9.9
Periodic Table
Science
Periodic Table-Question
Here is an example of a question you might see on a quiz or test.
Questions
SPI 0807.9.9
Periodic Table
Science
Periodic Table-Question
Here is an example of a question you might see on a quiz or test.