How Many?
Balancing and other Jazz
Words say what??
Puppies are cute (Random!)
Bonding
100
Count the atoms:
3H2SO4
H - 6
S - 3
O - 12
100
3Fe + 4H2O → Fe3O4 + 4H2
YES
100
The Law of Conservation of _____, tells us that in a chemical reaction, atoms cannot be created or destroyed.
Mass
100
Which side represents the reactants side of the equation?
2KNO3→ KNO2 + 2O
2KNO3
100
Which is which?
Covalent vs Ionic
One is between two non metals and one is between a metal and nonmetal
Covalent - two nonmetals
Ionic - metal and a nonmetal
200
Count the Atoms:
NaC2H3O2
Na - 1
C - 2
H - 3
O - 2
200
H2O + N2O3 → 2HNO2
NO
200
Fill in the blank:
The elements on the periodic table are arranged by increasing ___________________ _______________. Elements in the same group have __________________ characteristics. Protons have a ____________ charge. Nonmetals are located on the _____________ side of the periodic table.
atomic number
similar
positive charge
right
200
What is the coefficient in the following:
5
200
Covalent or Ionic Bond:
NaCl
CO2
LiBr
Covalent
Covalent
Ionic
300
Count the Atoms:
4Mg(OH)2
Mg - 4
O - 8
H - 8
300
2KNO3→ KNO2 + 2O2
NO
300
If an element symbol has no subscript next to it, then this indicates that there is only _________ atom of this element in the molecule.
One
300
The substance that begins a chemical reaction are known as the _____.
Reactants
300
When an Ion LOSES electrons, it becomes what charge?
When an Ion GAINS electrons, it becomes what charge?
Positive
Negative
400
Count the Atoms:
7C2S2
C - 14
S - 14
400
How many elements are in the following:
Fe2O3
How many atoms are in the following:
Fe2O3
2
5
Know the difference!
400
I am an element in group 17 and really want to become stable! How many more electrons do I need?
1
400
TRUE OR FALSE:
Subscripts are in front of the element.
2HO
FALSE
400
Which is which?
Covalent vs Ionic Bonds
One shares electrons
One transfers electrons
Covalent Bonds share electrons
Ionic Bonds transfer electrons
500
Count the Atoms:
4Al2(SO3)3
Al - 8
S - 12
O - 36
500
What is the mass of the following:
Proton
Neutron
Electron
1 amu
1 amu
0 amu
500
The ____________, which are represented by a single uppercase letter, or represented by an uppercase letter followed by a lowercase letter. This tells you the types of elements in the compound.
Elements
500
To find out how many atoms are in a molecule, you have to ___________ the subscript by the coefficient.
4H2O
Mulitply
500
Why do atoms forms bonds? What do they desire to do? Think of the octet rule.
To become stable (having 8 valence electrons)