Transcript IONS

BellRinger
EXPLAIN IN COMPLETE
SENTENCES THE BASICS
OF ION’S STRUCTURE
ELEMENT OF THE DAY
CHLORINE
Cl
ATOMIC NUMBER 17
ATOMIC WEIGHT 35.453
YELLOW-GREEN GAS, HALOGEN GROUP
ATOMIC STRUCTURE: 17p, 17e, 18n
ELECTRONIC STRUCTURE: 2, 8, 7
In order to understand
what ions are,
we need to know that…
the particles
that make up atoms
have either
positive or negative charge
+
+
+
+
+
positive and negative are opposites
+
+
they cancel each other out
+
+
+
net charge = zero
+
+
+
+
+
the positive (+) particle is called a
proton
+
the negative (-) particle is called an
electron
in an atom,
protons ( + ) are in
the center
and electrons ( )
are on the outside
+ ++
+ +
only electrons ( )
can be added
or taken away
+ ++
+ +
this is an atom with
5 electrons and
5 protons
+ ++
+ +
the atom is neutral
net charge = zero
+ ++
+ +
5 (-) and 5 (+) = zero charge (neutral)
+ ++
+ +
+ ++
+ +
+ ++
+ +
charge = ?
+ ++
+ +
charge = 1- (one minus)
+ ++
+ +
+ ++
+ +
+ ++
+ +
charge = ?
+ ++
+
2+ (two plus)
+ ++
+ +
WHEN REMOVING ELECTRONS
WHEN REMOVING ELECTRONS
THE RESULTING CHARGE IS POSITIVE
WHEN REMOVING ELECTRONS
THE RESULTING CHARGE IS POSITIVE
neutral
1+
WHEN ADDING ELECTRONS
WHEN ADDING ELECTRONS
THE RESULTING CHARGE IS NEGATIVE
WHEN ADDING ELECTRONS
THE RESULTING CHARGE IS NEGATIVE
neutral
2
An atom with positive or negative charge
is called an
drum roll
ION
Atoms without charge are called ATOMS
Atoms with positive or negative charge
are called IONS
Activities of the day
1. EACH GROUP WORKS ON THE ION GIVEN
ON THE BOARD
2. YOU DRAW ATOMIC AND ELECTRONIC
STRUCTURE OF YOUR ION IN THE WAY
I DID FOR CHLORINE ON THE BOARD
3. AFTER YOU FINISHED, YOUR GROUP
LEADER PRESENTS
THE RESULT
Group 1 - P+, 2 - Si+, 3 - Al++, 4 Mg+, 5 - Na+, 6 - Ne-,
GAME WITH PhET
SOFTWARE
“IONS”
Conclusion of the lesson
1. Atom becomes an ion if one or more electrons are
either added or removed from it
2. Nucleus content and structure remains unchanged
3. Electrons are organized in orbitals, 1st full orbital
has 2 e, 2nd full orbital has 8 e, 3rd full
orbital has 8 e, … .
Electrons maybe only added or removed from
the last orbital!
4. Charge of an ion = # of p - # of e
5. Neutral ion = atom
EXIT QUIZ
1. DESCRIBE DIFFERENCE BETWEEN ATOMS
AND IONS
2. PREDICT PROPERTIES OF A ION USING
ELECTRONIC STRUCTURE
2. EVALUATE CHARGE OF AN ION USING
ATOMIC NUMBER AND ELECTRONIC ST
RESOURCES
Notice that ONLY the number of e- changes
(Only electrons are added or subtracted)
The number of protons in an
Atom NEVER changes
(why?)
ions make up the salt you put on your eggs in
the morning
ions are required for your brain to function
(ions allow you to see and understand this presentation)
ions are an essential ingredient in soap
ions are required for cellular respiration C6H12O6 + O2
CO2 + H2O
ions make up acids and bases
ions keep your blood functioning
ions make up the salt you put on your eggs in
the morning
ions are required for your brain to function
(ions allow you to see and understand this presentation)
ions are an essential ingredient in soap
ions are required for cellular respiration C6H12O6 + O2
CO2 + H2O
ions make up acids and bases
ions keep your blood functioning
ETCETERA