Terminology
Bonding
Chemical Reactions
Counting Atoms
Wildcard
100
What is an indicator?
A chemical that helps visualize the products of a reaction.
100
How many electrons does it take to fill up the first electron shell?
2
100
T/F - Catalysts are used up during a chemical reaction.
False
100
How many TOTAL atoms are in the following molecule:
C2H6
8
100
What is a valence electron?
Electrons in the outer shell (highest energy level) of an atom.
200
What is a catalyst?
A chemical that speeds up the rate of a chemical reaction.
200
When two atoms of Oxygen bond together, they form an ____________
Oxygen molecule.
200
Which side of this equation is the reactants?
The Left
200
How many Nitrogen's are in the following molecule?
2NH3
2
200
What does an atomic number tell you?
The number of protons and electrons in an atom.
300
What is a precipitate?
A solid formed from a reaction of two liquids mixing together.
300
Electrons bond in order to fill up their:
Outer Shell (or energy level)
300
List 2 signals that a chemical reaction has taken place.
Bubbling
Color Change
Temperature Change
Forming of a Precipitate
etc.
300
How many total MOLECULES are on the reactant side of the following chemical equation?
CH4 + 2O2 = CO2 + 2H2O
3
300
T/F - Group 18, the noble gases, all have full valence shells. This means they do not readily bond with other atoms.
True.
400
What is an endothermic reaction?
Endothermic reactions have reactants that absorb heat - the products are higher in temperature.
400
Why is this the correct Lewis Dot Structure of Carbon, even though it has 6 electrons?
We only draw the valence electrons.
400
T/F - the only conditions that every chemical reaction needs are the reactants getting near each other.
False - temperature (or other energy like light) must be high enough.
400
T/F - the number of atoms and molecules on both sides of a chemical equation are equal.
False
400
What is an exothermic reaction? List an example of one.
One that releases heat into the environment - handwarmers are an example.
500
What is the conservation of mass?
The conservation of mass states that the amount of mass (number of protons, neutrons, and electrons) will always be equal on both sides of a chemical equation.
500
What is the difference between ionic and covalent bonding?
Ionic bonds occur between a metal and a non metal. They give and take electrons, forming ions.
Covalent bonds occur between two non metals. They share electrons and do not form ions.
500
T/F - testing with different chemicals (and performing different chemical reactions) can help you identify an unknown substance.
True
500
How many total atoms are there in the following molecule?
H2CrO4
7
500
T/F Ice melting is a chemical reaction.
False