102914 Changes Matter Period 1 Period 4 Period 5 Period 6 CATALYST What do you think an atom is Answer in complete sentences Homework Binder Notes front TURN IN writeups if you didnt yesterday ID: 555275
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Slide1
Unit 2, Day 25
10/29/14
Changes MatterSlide2
Period 1Slide3
Period 4Slide4
Period 5Slide5
Period 6Slide6
CATALYST
What do you think an atom is?
*Answer in complete sentences!
Homework:
Binder
Notes (front)
TURN IN write-ups if you didn’t yesterday
WEEK 9
10/29/14
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Changes Matter
None!Slide7
Learning Intention:
We will demonstrate knowledge of the elements that compose the
periodic table.
Success Criteria:
We will be successful when we can calculate the number of electrons, protons, and neutrons an element has based on the atomic number & mass number.
10/29/14
Changes MatterSlide8
Today’s Agenda
Turn in write-ups
Intro to Unit 3: The Atom
Notes
ReviewClip (if done early)Slide9
NEW Unit = THE ATOM
AKA the building blocks of matter
TAKE OUT UNIT 3 NOTES!
Lets be COLLEGIATESlide10
Remember…
Elements are:
_________________________________________
__________________________________________Slide11
The Atom
Although elements are the purest form of anything, they can be broken down into their smallest form: the
atom
Everything that is a pure element is made of the exact same atoms.Slide12
The Atom
Each atom is made of 3 parts: the proton, the neutron and the
electron
Proton:
subatomic particle that is found in the nucleus that carries a positive charge, and has a mass of 1
amu
(AMU = Atomic Mass Units)Slide13
The Atom
Each
atom is made of 3
parts
: the proton, the neutron
and
the
electron
Neutron
:
subatomic particle found
in the nucleus that has no charge and a mass of 1 amuSlide14
The Atom
Each
atom is made of 3
parts
: the proton, the neutron
and
the
electron
Electron:
subatomic particle found flying around the nucleus that carries a negative chargeSlide15
All atoms have the same general structure
The
protons and neutrons are found in the center, or the
nucleus
Electrons surround the nucleus in orbitalsSlide16
We
identify
each
element
by how many protons it has
…This is the
atomic number
Each element has a unique atomic
number
This
number increases as you move from left to right on the periodic tableSlide17
In order for an element to not carry a charge, the number of protons and the number of electrons must be exactly the same
.
Example: The atomic number of carbon is 6. How many protons and electrons does it have
?
Atomic number
=
Number
of protons =
Number
electrons
6=6=6
→
6
protons
&
6 electronsSlide18
Practice: Determine the number of protons and electrons each of the following elements has.
1. Br
2. Xe
3. Sb
4. HSlide19
Practice: Determine the number of protons and electrons each of the following elements has.
1. Br
35
protons, 35 electrons
2. Xe
54
protons, 54 electrons
3. Sb
51
protons, 51 electrons
4. H
1 proton, 1 electronSlide20
Each
individual atom
has a
mass, measured in atomic mass
units
a
mu
is
used because the mass of each subatomic particle is
too
small
to
measure in
gramsThe mass of each atom is equal to the number of protons plus the number of neutrons. (Electrons are ignored, because their mass is so small that they don’t affect the mass enough)Slide21
Example: Determine how many protons, neutrons and electrons helium has.
Find
the chemical
symbol
Identify
the atomic
number
(#
protons
)
Identify
the atomic
mass
Take atomic mass – atomic number
to
find number of neutrons Round to nearest whole numberSlide22
Practice: Complete the table.
Element Name
Element Symbol
Atomic Mass
Protons
Neutrons
Electrons
Carbon
12.01
6
N
7
7
17
Xe
PotassiumSlide23
Practice: Complete the table.
Element Name
Element Symbol
Atomic Mass
Protons
Neutrons
Electrons
Carbon
C
12.01
6
6
6
Nitrogen
N
7
7
17
Xe
PotassiumSlide24
Success Criteria Question
Using your periodic table, what element has 8 neutrons and an atomic mass of 16?
*
Complete Sentences
!
Have a good day
10/29/14
Changes Matter