Periodic Table
How many valence electrons does an element in group 16 have?
6
In a balanced equation, the total mass of the reactants must equal the total mass of the products, according to the _________.
Law of Conservation of Mass
2Na + Cl2 > 2NaCl is an example of which type of reaction?
Synthesis
Define Nuclear Fusion.
The fusing of two or more lighter atoms into a larger one.
A + B > AB represents the general formula for which type of reaction?
Synthesis
If an element has 12 protons, what group and period does it belong to?
group 2, period 3
Balance:
H2O > H2 + O2
2H2O > 2H2 + O2
This type of reaction will result when something is burned.
Combustion
Where does nuclear fusion occur?
In the sun and stars
Where would you find a nuclear fission reaction?
Powerplants
What type of bond will form between nitrogen and fluorine? Why?
Covalent, they are both nonmetals and will share electrons
Balance:
Pb(OH)2 + HCl > H2O + PbCl2
Pb(OH)2 + 2HCl > 2H2O + PbCl2
2K + 2H2O > H2 + 2KOH is an example of which type of reaction?
If you start with 34 grams of a radioactive isotope, how much will you have left after one half life?
17 grams
Name the following compound:
PCl3
Phosphorus Trichloride
Which of the following elements is the most stable and why? Ca, Si, Ar, Cl, N
Balance:
C3H8 + O2 > CO2 + H2O
C3H8 + 5O2 > 3CO2 + 4H2O
What type of reaction is this:
NaCl + AgNO3 > NaNO3 + AgCl
Double Replacement
If Uranium has 92 protons, how many neutrons does Uranium-238 have?
146 neutrons
Balance and Classify:
KI + Br2 > KBr + I2
2KI + Br2 > 2KBr + I2
Single replacement
What is the mass number of an atom that has 12 protons and 12 neutrons?
24 amu
Complete and balance this synthesis reaction:
K + Cl2 >
2K + Cl2 > 2KCl
The process of digestion, or the breakdown of the food you eat, is most likely which type of reaction?
Decomposition
After the process of nuclear fission, are the total number of neutrons the same as, less than, or more than before the reaction?
the same as before the reaction
Complete and balance this double replacement reaction:
Al(OH)3 + Mg3(PO4)2 >
2Al(OH)3 + Mg3(PO4)2 > 2Al(PO4) + 3Mg(OH)2