Type of Reaction
Describe a synthesis reaction.
Two different molecules react and form one molecule.
This type of bonding shares electrons
Covalent!
How are atoms and molecules related?
What elements is water made up of and how many of each elements are there?
2 Hydrogens, 1 Oxygen
What is the Law of Conservation of Matter?
Matter cannot be created or destroyed.
Name 4 of the different types of reactions.
Synthesis, Decomposition, Combustion, Single displacement, Double displacement
This type of bonding donates (steals) electrons...
Ionic
What is in the middle of an atom?
Nucleus - protons and neutrons
What is the definition of polarity?
One side of the molcule is positive, one side of the molecule is negative
Why is stoichiometry important in chemical equations?
Everything has to be balanced because you cannot create or destroy atoms. They all have to be accounted for.
What type of reaction is this:
C10H8 + 12 O2 → 10 CO2 + 4 H2O
Combustion
Covalent or ionic? (Picture)
Ionic!!!
Potassium (K) has an atomic number of 19. It has a mass number of 39. How many neutrons does it have?
20
What causes a molecule to be polar?
One element holds the electrons closer to itself than the other element. Giving one side of the molecule a positive and the other side a negative.
Balance this equation:
2 H2 + _____O2 --> 2H2O
What type of reaction is this.
Single displacement
Describe each step in this type of bonding:
The proton of one is attracted to the electron of another. Vice versa.
The electrons are then shared in the middle so the outer shells are happy.
How are atoms (protons and electrons) similar to a sun and planets?
The proton is like the sun. The electrons are like the planets. The planets rotate around the sun just like electrons go around the protons.
Why can a needle that is more dense than water float on water?
Balance this equation:
2 SO2 + _____ O2 ---> 2 SO3
Balance the following equation and then name the type of reaction:
Decomposition
2 - 2 - 1
What type of bonding does a polar molecule have? How do you know?
Covalent - they have to be sharing because one has to hold the electrons a little closer to make it have a more negative charge.
What is the definition of atomic number and mass number?
Atomic number is the number of protons an element has. Mass number is the number of protons and neutrons (how much is weighs).
Describe what surface tension is.
Surface tension is the ability of water to cause things to float that are actually more dense because of water's polarity and attraction to each other.
Balance this equation:
4 P + 5 O2 ---> _____ P4O10