Element, Molecule, or Compound?
Cl2
Molecule
How many H atoms are represented by this chemical formula?
NaHCO3
1
Finish this sentence:
The Law of Conservation of Matter states that matter cannot be _________________ nor ________________.
Created
Destroyed
A solid was dropped into a liquid and the glass steamed.
Chemical
Favorite food
Pizza
Cu
Element
How many S atoms are represented by this chemical formula?
Al2(SO4)3
3
What is the difference between reactants and products?
Reactants are the starting materials for a chem rxn, products are what is made in a chem rxn.
Cooking food
Chemical
Favorite sport
Volleyball
H2O2
Compound
How many O atoms are represented by this chemical formula?
2Fe(OH)3
6
Describe what happens to the chemical bonds in a chemical reaction when reactants are changed into products.
Chemical bonds between reactants are broken. Atoms are rearranged. Then the chemical bonds are reformed to make new molecules.
Crushing an aluminum can.
Physical
Where did I go to college?
UW-River Falls
N3
Molecule
What does a subscript tell us in a chemical formula?
How many atoms there are of a specific type of element.
A log has a mass of 500 g. It is burned. The mass of the ash is 200 g. What happened to the rest of the mass of the log?
It was released as a gas/smoke.
What is a precipitate?
A solid that is formed when two liquids are mixed together.
Birth Month?
July
What is the difference between a molecule and a compound?
Molecules are made up of two or more types of atoms. Compounds are made up of two or more DIFFERENT types of atoms.
What does a coefficient tell us in a chemical formula?
How many molecules there are.
How can you tell if a chemical equation follows the Law of Conservation of Matter?
If the number of atoms and types of atoms on both sides of the equation are equal!
What are the 5 main signs that a chemical reaction took place?
color change
temperature change
odor change
gas formed
precipitate formed
How many different vegetables do I have planted in my garden this year?
8