The Periodic Table of Elements

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Transcript The Periodic Table of Elements

The Periodic Table of Elements
Your new best buddy! *squee!*
This is the periodic table…
Q: Why does it is look so stupid?
It isn’t really stupid, it is just a little bit
complicated.
 It is a way of organizing the patterns
found in atoms.
 FYI: The Periodic Table was created by
Dmitri Mendeleev.
 There are other ways to organize the
patterns of atoms though…

I like this way better…
But that’s for Chem., next year.
Sorry…
 But I am going to make this painless for
you.
 I’m going to cut up the table!
 Seriously.
 Don’t freak out.
 Ok… here goes…

Don’t do this to your table…
What you need to know, part 1
Groups
Represent the # of Electrons in outer shell.
1
1
Periods
2
3
Represents
The # of
Shells
The
Atom
Has
4
5
6
7
8*
2
3
4
5
6
7
*Element
He only
has 2
electrons
in its
outer
most
shell.
Example of an atom:

How many shells
does this atom
have?
 How many
electrons are in the
outer most shell?
 Which element is
this? (Hint: find it on
your periodic table!)
What you need to know, part 2
Atomic Number
(# of Protons &
also # of Electrons)
Atomic Symbol
Atomic Name
Atomic Mass
Protons + Neutrons
(We don’t weigh
Electrons!)
But, Mister! Why do we need to
know this in Biology?
1st – It’s on your Science Proficiency!
 2nd - All life on Earth (including YOU) is
made mostly from these elements!


Specifically the Big Four
Nitrogen
 Hydrogen
 Carbon
 Oxygen


[N]
[H]
[C]
[O]
3%
10%
18%
65%
The above %s are for the average human
After the Quiz on Friday

Intro another Big Idea in Biology

Info on our first lab!

Get a worksheet, it’s due first thing
tomorrow!