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Chemistry group 3 -Katelyn Zuber
-Emma Leisen
-Maddie Simonson
-Colton Jakobitz
-Alex Perelman
-Gonzalo Ajenjo
Structure of metals
Metallic Bond
A Metallic Bond is the attraction between a metal cation and
the shared electrons that surround it.
Can be mistaken for just bonding two metal elements together.
Metallic Bonds make it so when a metal is struck, electrons
move somewhere else in the metal changing its shape, but the
metal does not break.
A metal has a built-in supply of charged particles which is the pool
of shared electrons that the Metallic Bond attracts.
Alloy
An Alloy is a mixture of two or more elements, at least one
of which is a metal.
Can be mistaken for just being a mix of any two or more
elements.
Alloys can for example make another metal stronger, more
resistant to wear, and more.
Naming Compounds and Writing
Formulas
Naming Formulas
The name and formula of a molecular compound
describe the number of atoms in a molecule of the
compound.
Naming formulas is used this way because if you know
the name of a ionic compound you can write its
formula. (just ionic?)
Naming compounds
When naming compounds the most
general rule is that the most metallic
element appears first in the name.
These elements are farther to the left in
the periodic table.
For example 1: Mono- 2: Di- 3: Tri- Etc.
How do you name other compounds?
What’s a cation? Anion? How are those
named?
Describing Reactions
Chemical Equation
A chemical equation is where you show
a chemical reaction with formulas
Example: carbon + oxygen = carbon
dioxide would be shown as
C + O2 CO2
This is important because it helps
organize chemical reactions and makes it
simpler to wright.
The Law of Conservation of
Mass
This law states that mass isn’t destroyed or
created in a chemical reaction
So basically if you combine C and O2 the two will
not loose mass when making CO2
This is important because it laid the foundation
for modern chemistry
Molar Mass
It is the mass of one mole of a
substance. It has nothing to do
with teeth
What is a mole?
It’s important because it can
measure things in smaller units
Calculating Mass of a
Reactant or Product
You do this by using a balanced
chemical equation and molar
masses of the reactants and
products
Balancing equations
Is this
equation
balanced?
Chemical Equations
• The chemical equations are representations
of the chemical reactions.
• They have two parts, the reactants and the
products.
• They are separated by an arrow, that shows the
direction
of the equation.
• For example, the combustion of methane that
produces
carbon dioxide and water:
CH4 + O2 CO2 + H20
[ reactants][products]
• Each reaction has to have the same mass in
the reactants and products (same number of
atoms)
• So we place a number in front of each
molecule (this numbers are called
stoichiometric coefficients)
Example: Propane Combustion
C3H8 + O2 CO2 + H2O
C3H8 + O2 CO2 + H2O
Can start with the C, there are 3 in reactants and 1 in
products, so we need 3 molecules of CO2 for
balancing it
C3H8 + O2 3O2 + H2O
We continue with H, there is 8 in reactants and 2 in
products, so we need 4 in H2O for balancing it
C3H8 + O2 3O2 + 4H2O
There’s only O left, there’s 2 in reactants and (3x2 +
4x1)=10 in products, so we need 5 molecules of O2
(5x2)=10
C3H8 + 5O2 3CO2 + 4H2O
So now the equation is balanced =)