Transcript Reading Quiz

Do Now:
Fill in the table below
SUBATOMIC
PARTICLE
LOCATION
(in the atom)
RELATIVE
CHARGE
MASS
(amu)
Proton
In nucleus
+1
1
Neutron
In nucleus
0
1
Electron
Outside of
nucleus
-1
0
(electron cloud)
Chemistry


9/17/13
Mrs. Turgeon
“Great minds discuss ideas; average minds
discuss events; small minds discuss
people.” – Eleanor Roosevelt
DO NOW: In your notes, write down
everything you know about an atom
Chemistry 9/18/13 Mrs. Turgeon
“Do what others won’t to achieve what
others don’t” – anonymous
DO NOW: In your notes, answer: “What
does the atomic number of an element
represent?”
Honors Chemistry
9/18/13
AGENDA
1. Finish POGIL worksheet (15 minutes)
2. Check-in with the class (spokespersons
be ready to share your group’s answers)
3. Start Isotopes POGIL
YOUR REVIEW OF LIT FOR SCIENCE FAIR
IS DUE NEXT WEDNESDAY!!!!!!!!!!!!!!
Interpretation of a Chemical Formula
Sulfuric Acid
O
O
S
O
H
O
H
H2SO4
Two atoms
of hydrogen
One atom
of sulfur
Four atoms
of oxygen
Models of the Atom
e
+
e
e
+
e
+
+
e
+e
+e
e
+ e + e
Dalton’s model
Democritus’s
model
(1803)
(400 B.C.)
1803 John Dalton
pictures atoms as
tiny, indestructible
particles, with no
internal structure.
1800
-
-
- +
Thomson’s plum-pudding Rutherford’s model
model (1897)
(1909)
1897 J.J. Thomson, a British
1911 New Zealander
scientist, discovers the electron,
leading to his "plum-pudding"
model. He pictures electrons
embedded in a sphere of
positive electric charge.
1805 ..................... 1895
1900
Ernest Rutherford states
that an atom has a dense,
positively charged nucleus.
Electrons move randomly in
the space around the nucleus.
1905
1910
1904 Hantaro Nagaoka, a
Japanese physicist, suggests
that an atom has a central
nucleus. Electrons move in
orbits like the rings around Saturn.
Dorin, Demmin, Gabel, Chemistry The Study of Matter , 3rd Edition, 1990, page 125
1915
Bohr’s model
(1913)
1926 Erwin Schrodinger
1913 In Niels Bohr's
develops mathematical
equations to describe the
motion of electrons in
atoms. His work leads to
the electron cloud model.
model, the electrons move
in spherical orbits at fixed
distances from the nucleus.
1920
1925
1924 Frenchman Louis
Charge-cloud model
(present)
1930
de Broglie proposes that
moving particles like electrons
have some properties of waves.
Within a few years evidence is
collected to support his idea.
1935
1932 James
1940
Chadwick, a British
physicist, confirms the
existence of neutrons,
which have no charge.
Atomic nuclei contain
neutrons and positively
charged protons.
1945
Chemistry
9/20/13
Mrs. Turgeon
DO NOW:
1. In your notes: “What
does the mass number
in the Isotopic chemical
Symbol represent?”
Chemistry 9/20/13 Mrs. Turgeon
Agenda
1.
2.
3.
Review Isoptopes
Review Atom POGIL
Review Beanium Lab
Isotopes

Atoms of the same element with
different mass numbers
(because they have different #’s of neutrons)

Atomic symbol:
Mass #
Atomic #
 Hyphen
11
5
B
notation: Boron-11
Fill in the blanks below…
= proton
A
# of
Protons
5
5
B
= neutron (no electrons shown)
# of
neutrons
5
6
atomic
number
5
5
mass
number symbol
10
10
5B
11
11
5B
Isotopes - practice

Chlorine-37
 atomic
 mass
#:
#:
17
37
#
of protons:
#
of electrons: 17
#
of neutrons:
17
20
Courtesy Christy Johannesson www.nisd.net/communicationsarts/pages/chem
37
17
Cl
Isotope Worksheet
Diagram
# Protons
# Neutrons
Element
2
2
Helium
3
3
Lithium
4
3
Beryllium
Symbol
Isotope Worksheet
Diagram
# Protons
# Neutrons
Element
4
5
Beryllium
6
7
Carbon
7
8
Nitrogen
Symbol
Isotope Worksheet
Diagram
# Protons
# Neutrons
Element
8
7
Oxygen
Symbol
9. Which two nuclei are isotopes of each other?
Same element, different
mass numbers
Beanium Lab
The 3 Isotopes of Beanium represent the
SAME ELEMENT. They are exactly the same
except for the number of neutrons!
Let’s compare our model (Beans) to a real
element (Carbon)
Carbon-12 and Carbon-14
Carbon-14
Electrons
+
+
+
+
Neutrons 8
Protons 6
Electrons 6
+
+
+
Carbon-12
Nucleus
Neutrons 6
Protons 6
Electrons 6
+
+
+
+
+
Nucleus
Electrons
Carbon-12
Mass #
Atomic #
12
6
C
Mass #
Atomic #
14
6
C
Carbon-14
Beanium Lab
Let’s do the last problem together.
Who wants to share their data?
IONS



Ions are atoms that have lost or
gained electrons.
An atom that loses an electron
becomes a positive ion (CATION)
An atom that gains an electron
becomes a negative ion (ANION)
EXAMPLES OF IONS
1.
2.
3.
A magnesium atom loses two eand becomes… Mg2+ (a cation)
A chlorine atom loses two e- and
becomes… Cl1- (an anion)
When these two ions bond, what
compound is formed?

Magnesium chloride, MgCl2
(more on this next chapter!)
Practice Ions Chart…
Ion Symbol
Protons
Electrons
Charge
S 2K 1+
Ba 2+
Fe 3+
Fe 2+
F 1O 2P 3-
16
19
56
26
26
9
8
15
18
18
54
23
24
10
10
18
-2
+1
+2
+3
+2
-1
-2
-3
HOMEWORK –

Read 4-10 & 4-11

#’s 65-73,80-83

Study for a possible element quiz
next week!