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Physical
Science
Atoms — Day 7
Materials Needed:
•
Writing Utensil
•
Folder
•
Notebook
Atoms Day 7
 Bell

work:
What is concrete made of? (Think about
what is in it!)
 Agenda



Quiz
Introduction to atoms
Exit Slip
Q1: Using the picture below, what is the
reason why a juice company would change
the design of their bottle?
A. bottle 2 weighs less than
bottle 1
B. bottle 2 looks better than
bottle 1
C. bottle 2 is easier to pour
than bottle 1
1
2
old
new
D. bottle 2 is recyclable and
bottle 1 is not
SC8.1.3.d DOK 3
Q2: How are compounds and mixtures
different?
A. Compounds and mixtures are not different.
B. Mixtures and compounds can both be separated
physically.
C. Compounds can be separated physically, but
mixtures must be separated by a chemical
reaction.
D. Mixtures can be separated physically, but
compounds must be separated by a chemical
reaction.
SC8.2.1.a DOK 2
Mathematics Booster
Based on the graph,
which statement is
FALSE?
A. Only the Group 2
elements are shown.
B. Calcium has the
largest radius.
C. Magnesium is neither
the largest not the
smallest.
D. Barium is the largest.
Greek/Latin
Greek/Latin
pro
atom
-ide
iso
Meaning
in front of, first
not, without
cut, incision
a thing
connected with
or belong to
same
Examples
Objectives
I
will know the charges and
locations of protons, neutrons
and electrons in an atom
I will be able to determine how
many protons, electrons and
neutrons are in an element and
explain how to determine the
number of protons, electrons and
neutrons
Bell Work Answer

What is concrete made of? (Think about
what is in it!)
A1: Using the picture below, what is the
reason why a juice company would change
the design of their bottle?
A. bottle 2 weighs less than bottle 1
Based on the picture, there is no
evidence that one bottle weighs
less than the other.
B. bottle 2 looks better than bottle 1
Based on the picture, there is no way
to tell if someone thinks that one
bottle looks better than the other.
C. bottle 2 is easier to pour than bottle
1
Bottle 2 has a handle which makes
it easier to pour.
D. bottle 2 is recyclable and bottle 1 is
not
Based on the picture, there is no
evidence that one is recyclable
and the other is not.
1
2
old
new
SC8.1.3.d DOK 3
A2: How are compounds and mixtures
different?
A. Compounds and mixtures are not different.
Compounds must be separated by a chemical reaction, but
mixtures can be separated physically.
B. Mixtures and compounds can both be separated physically.
Mixtures can be separated physically, but compounds
cannot.
C. Compounds can be separated physically, but mixtures must
be separated by a chemical reaction.
Compounds must be separated by a chemical reaction,
but mixtures can be separated physically.
D. Mixtures can be separated physically, but compounds must
be separated by a chemical reaction.
For example, a mixture like salt water can be separated
physically into salt and water by boiling the water out. In
order for a compound like water (H2O) to be separated
into hydrogen and oxygen, a chemical reaction must occur.
SC8.2.1.a DOK 2
Mathematics Booster
Based on the graph, which
statement is FALSE?
A. Only the Group 2 elements
are shown. TRUE
B. Calcium has the largest
radius. FALSE
C. Magnesium is neither the
largest not the smallest.
TRUE
D. Barium is the largest. TRUE
Rules For Producing Questions
 Ask as many questions as you can
 Do not stop to answer, judge or to discuss the questions
 Write down every question exactly as it is stated
 Change any statement into a question
Qfocus—Semester 1—Unit 1—Matter and Energy—Section 02—Atoms
Rules for Producing Questions:
 Ask as many questions as you can
 Do not stop to answer, judge or to
discuss the questions
 Write down every question exactly as it
is stated
 Change any statement into a question
Categorizing Questions
CLOS
EDENDE
D
Categorizing Questions
Closed-ended Questions can be answered with a “yes’ or
“no” or with a one-word answer
Open-ended Questions require more explanation
Prioritizing Questions
Prioritizing Questions
Review your list of questions and choose three
questions (most important; to develop a project, etc.).
Mark them with an “X”
Remember to keep the QFocus in mind while
prioritizing.
What is an atom?
Atom:
the smallest unit of
matter that retains the
identity of the substance
First
proposed by
Democratus.
Atomic Structure
Atoms
are composed of 2 regions:
Nucleus: the center of the atom that
contains the mass of the atom
Electron cloud: region that surrounds the
nucleus that contains most of the space in
the atom
Electron
Cloud
Nucleus
What’s in the Nucleus?
The
nucleus contains 2 of the 3
subatomic particles:
Protons: positively charged
subatomic particles
Neutrons:
particles
neutral subatomic
*Protons and neutrons have the same
mass.
What’s in the Electron Cloud?
The
3rd subatomic particle
resides outside of the nucleus
in the electron cloud
Electron:
the subatomic
particle with a negative charge
and relatively no mass
How do these particles
interact?
Protons
and neutrons exist compacted
in the tiny positively charged nucleus
accounting for most of the mass of
the atom
The
negatively charged electrons are
small and have relatively no mass but
occupy a large volume of space
outside the nucleus
How do the subatomic particles
balance each other?
In
an atom:
The protons = the electrons
If 20 protons are present in an
atom then 20 electrons are there
to balance the overall charge of the
atom—atoms are neutral
The neutrons have no charge;
therefore they do not have to equal
the number of protons or electrons
Open your textbook or
your agenda to the
page containing a
periodic table of
elements (132-133).
How do we know the number of subatomic
particles in an atom?
Atomic
number: this number indicates the
number of protons in an atom
 Ex:
 So
 Ex:
 So
Hydrogen’s atomic number is 1
hydrogen has 1 proton
Carbon’s atomic number is 6
carbon has 6 protons
**The number of protons identifies the
atom.
Ex. 2 protons = He, 29 protons = Cu
Think Pair Share
With
your partner, find the atomic
number of each element has:
Student A: Carbon (C)
Student B: Potassium (K)
Student A: Beryllium (Be)
Student B: Helium (He)
**After you have completed your
element, share with your group.
How do we know the number of
subatomic particles in an atom?
Mass
number: the number of
protons and neutrons in the nucleus
Ex:
Silicon can have a mass of 28.
Since it has 14 proton it must have
14 neutrons
# of neutrons = mass # - atomic #
Determining the number of protons and
neutrons
Li has a mass number of 7 and an atomic
number of 3
Protons = 3 (same as atomic #)
Neutrons= 7-3 = 4 (mass # - atomic
#)
Ne has a mass number of 20 and an
atomic number of 10
Protons = 10
Neutrons = 20 - 10= 10
Try this example on your own!:
Let’s check out Calcium (Ca)!
Calcium’s Atomic Number = 20
Calcium’s Atomic Mass = 40
Calcium’s Neutrons = 20
Think Pair Share
Decide
how many protons
and neutrons each element
has.
Student A: Carbon (C)
Student B: Iodine (I)
Student A: Silicon (Si)
Student B: Iron (Fe)
What about the electrons?
The
electrons are equal to the
number of protons
So e- = p+ = atomic #
Ex: Li has a mass # of 7 and
an atomic # of 3
p+ = 3
Easy peasy lemon
o
n = 4
squeezy!…

e- =3
Think Ink Share
Write
your answers to the
following and then share
with your partner.
How many electrons does
Mercury (Hg) have?
Barium (Ba)?
Titanium (Ti)?
Determine the number of
subatomic particles (all 3) in
the following:
Examples:
1. Find Chlorine (Cl)
Cl has a mass # of 35 and an atomic #
of 17
p+ = 17,
no = 18, e- = 17
K has a mass # of 39 and an atomic #
of 19
p+ = 19,
no = 20
e- = 19
Think Ink Share
Write
your answers and then
share with your partner.
Find the number of protons,
neutrons and electrons of
the following:
Titanium (Ti)
Nickel (Ni)
Copper (Cu)
How exactly are the particles
arranged?
Bohr
Model of the atom:
The 3rd
ring can
hold up
to 18 e-
All of the
protons
and the
neutrons
The 1st ring
can hold up
to 2 e-
The 2nd ring
can hold up
to 8 e-
What does carbon look like?
Mass # = 12
atomic # = 6
6 p and 6 n
exist in the
nucleus
p+ = 6
no = 6
e- = 6
Homework
 Atomic
Math Challenge
Exit Ticket
Explain
how we know the
number of protons,
electrons, and neutrons
there are in the element
Copper.