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 =)