Transcript Notes-Periodic Table (1st Part)

Notes
SPI 0807.9.9
Periodic Table
Science
Tennessee SPI Objective:
Use the periodic table to determine the properties
of an element.
Check for
Understanding
Instructions
Identify
atomic
number,
atomic
mass,
number of
1) Firstthe
click
on "View"
from the
top-menu
bar.
2) Thenneutrons,
click on "Slide
frominthe
drop-down
protons,
and Show"
electrons
atoms
usingmenu.
the
3) Thentable.
use the right-arrow button on your keyboard to
periodic
advance through this presentation.
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
 F.Y.I We have discovered 98 naturally occurring elements
F.Y.I. We have also formed 20 man-made elements
98 + 20 = 118 total
Notes
SPI 0807.9.9
Periodic Table
Science
.
 Most common element in the universe is hydrogen
(About 73% of all matter is hydrogen)
 2nd common element in the universe is helium
(About 25% of all matter is helium)
1
2
H
Hydrogen
He
Helium
1.0
4.0
73% of all matter
25% of all matter
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
How to determine the number of neutrons
Lithium Atom
Protons: Three
Electrons: Three
Neutrons: ??????
Step 1: Round the atomic mass to the
nearest whole number
Atomic Number
Example: 6.941 rounds to 7
Step 2: Subtract the atomic number
from this rounded number
(Atomic number is 3)
Example: 7 - 3 = 4 neutrons
Atomic Mass
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.