Structure of Matter

Structure of Matter

YOU WILL WANT TO HAVE YOUR NOTEBOOK HANDY...

GET IT NOW!

I tell you this for a reason, even if you have no notes in it.

YOU WILL WANT TO HAVE YOUR NOTEBOOK HANDY...

GET IT NOW!

I tell you this for a reason, even if you have no notes in it.

2H₂ + O₂ = 2H₂0

(reactant) (product)

Notice that the

 reactant is on the LEFT side and the product is on the RIGHT side of the chemical reaction

Write this down!

The Law of Conservation of Matter/Mass

• That the number of atoms on the reactant side must equal the number of atoms on the product side

• 
  

  
  

• 
  

  
  

• 
  

  
  

The Law of Conservation of Matter/Mass

• That the number of atoms on the reactant side must equal the number of atoms on the product side

• NO ATOMS ARE CREATED OR DESTROYED during a reaction

• 
  

  
  

• 
  

  
  

The Law of Conservation of Matter/Mass

• That the number of atoms on the reactant side must equal the number of atoms on the product side

• NO ATOMS ARE CREATED OR DESTROYED during a reaction

• You will have the same amount of each type of atom on each side of the reaction

• 
  

  
  

The Law of Conservation of Matter/Mass - Write this down!

• That the number of atoms on the reactant side must equal the number of atoms on the product side

• NO ATOMS ARE CREATED OR DESTROYED during a reaction

• You will have the same amount of each type of atom on each side of the reaction

• The mass on each side of the reaction must total the same on each side of the reaction

2H₂O means

there are 2 molecules of water

Write this down!

2H₂O means

there are 2 molecules of water...

made of 4 atoms of Hydrogen

write this down!

2H₂O means

there are 2 molecules of water...

made of 4 atoms of Hydrogen

and 2 atoms of Oxygen

Write this down!

2H₂O means

there are 2 molecules of water...

made up of 4 atoms of Hydrogen,

and 2 atoms of Oxygen?

...so basically the big 2 means multiply everything in that molecule

Write this down!

Elements * Write this down!

• on the periodic table

• are a single type of ATOM

• 
  

  
  

• 
  

  
  

• 
  

  
  

Elements * Write this down!

• on the periodic table

• are a single type of ATOM

• Each element is made of an atom of a different size

• 
  

  
  

• 
  

  
  

Elements * Write this down!

• on the periodic table

• are a single type of ATOM

• Each element is made of an atom of a different size

• Example: Carbon (C) is made of an ATOM with 6 protons & 6 neutrons & 6 electrons

• Example: Potassium (K) is made of an ATOM with 19 protons & 19 neutrons & 19 electrons

Elements * Write this down!

• on the periodic table

• are a single type of ATOM

• Each element is made of an atom of a different size

• Example: Carbon (C) is made of an ATOM with 6 protons & 6 neutrons & 6 electrons

• Example: Potassium (K) is made of an ATOM with 19 protons & 19 neutrons & 19 electrons

• NO₂ would not be an element, it has more than one atom

Now get ready, we are doing a quiz on everything we have learned so far...

This counts as a QUIZ GRADE.

Multiple Choice

When a chemical reaction is balanced, what do you know about the atoms on each side?

• The number of atoms on each side are equal.

• The number of atoms on each side are way different.

• The number of atoms might change.

Multiple Choice

In the reaction

2H₂ + O₂ = 2H₂O

The molecules involved are...

Reactant: H = 2 O = 1

Product: H₂0 = 2

• Yes, this is correct. The number of molecules on each side can vary, it's all about the number of atoms.

• No, a reaction cannot have 3 molecules as a reactant and 2 as a product.

• Yes, this is correct. A reaction cannot have 3 molecules as a reactant and 2 as a product.

• No, a reaction should have the the same molecules on each side.

Multiple Choice

In the reaction

2H₂ + O₂ = 2H₂O

The atoms involved are...

Reactant: H = 4 & O = 2

Product: H = 4 & O = 2

• true

• false

Multiple Choice

Two or more atoms chemically bonded together are called a

• atom

• periodic table

• molecule

• mixture

Multiple Choice

2H₂ + O₂ = 2H₂0

What does the underlined 2 mean?

• There are 2 molecules of water in the product.

• There are 2 atoms of water in the reactant.

• There are 2 molecules of water in the reactant.

• There are 2 atoms of water in the product.

Multiple Choice

The mass of the products of a reaction will always equal what?

• The same sum of the mass of the reactants

• You never can tell

• A bit more than the mass of the reactants

Multiple Choice

2H₂ + O₂ = 2H₂0

What does the blue 2 mean?

• There are 2 oxygen atoms bonded together to make an oxygen molecule in the reactant.

• There are 4 oxygen molecules in the reactant.

• Water is what we started with and what we ended up with in the reaction.

Multiple Choice

What does the law of conservation of matter say?

• Matter is neither created nor destroyed in a chemical reaction.

• Matter is always destroyed in any ordinary chemical reaction.

• Chemical reactions always result in a heavier substance.

Multiple Choice

2H₂ + O₂ = 2H₂0

How many molecules of hydrogen are in the reactant?

• 2

• 1

• 0

• 4

Multiple Choice

2H₂ + O₂ = 2H₂0

How many atoms of Hydrogen are in the reactant?

• 4

• 2

• 8

• 1

Multiple Choice

What happens during a chemical reaction?

• The atoms of the original substances rearrange themselves into a new configuration to form new substances.

• Molecules are lost somewhere.

• Molecules turn into protons and neutrons.

Multiple Choice

How are elements different from atoms?

• Elements are made out of atoms

• Atoms are made out of elements

• Elements are made out of molecules

• Molecules are made out of atoms.

Multiple Choice

How many carbon atoms are there in C₃H₁₂O₅?

• 1

• 3

• 12

• 5

Multiple Choice

How many different types of atoms are in NO₂?

• 1

• 2

• 3

• 4

Multiple Choice

Is K an element or a molecule?

• element

• molecule

Multiple Choice

Is NO₂, Sodium Dioxide, an element or a molecule? (hint* Where do we find Elements?)

• element

• molecule

Multiple Choice

Elements are made of

• many types of atoms

• the compound table of molecules

• one type of atom, just of various sizes

• molecules

Multiple Choice

How many hydrogen atoms are there in a water molecule? H₂0

• 0

• 1

• 2

• 3

Multiple Choice

What would be the correct order of complexity? From most basic to most complex

• Atoms->Elements->Molecules

• Elements->Atoms->Molecules

• Compounds->Molecules->Atoms

• Molecules->Electrons->Atoms