Periodic Table
This group on the Periodic Table is non-reactive.
What are the noble gases?
The octet rule says that atoms tend to move towards having this number of valence electrons.
What is eight?
____ Al + ____ Fe3N2 --> ___ AlN + ___ Fe
__2__ Al + ____ Fe3N2 --> __2_ AlN + _3__ Fe
How many grams are there in 4.5 moles of silver metal?
MM Ag = 107.86
4.5 moles Ag | 107.86 g = 485.37 g
| 1 mol Ag
This is what kind of turtle Joaquín is.
What is a Guadalupe turtle / Southern slider turtle?
Name two properties of halogens.
- 7 valence electrons
- Highly chemically reactive
- Mostly gases
As you move from left to right, this is what happens to atomic radius.
What is it decreases?
____ H2O2 --> ___ H2O + ___ O2
__2__ H2O2 --> __2_ H2O + ___ O2
How many moles are there in 57.5 g water?
Water is H2O.
H = 1.00 g/mol * 2 = 2.00 g
O = 16.00 g/mol *1 = 16.00 g
Water total = 2+16 = 18.00 g/mol
57.5 g H2O | 1 mol = 3.19 mol
| 18.00 gIn this year, Costa Rica abolished its military.
What is 1948?
This term refers to two chemically identical substances that have different orientations, and therefore, physical properties.
What is an allotrope?
Explain why ionization energy gets higher as you move from left to right on the Periodic Table.
As there are more and more protons in the nucleus of an atom, the electrons are more difficult to remove. This can also be remembered because as you move from left to right, the number of valence electrons gets closer to eight, meaning that an atom will be unlikely to give up an electron and more likely to steal an electron from a different atom.
____ B2Br6 + ____ HNO3 --> ___ B(NO3)3 + ___ HBr
____ B2Br6 + __6__ HNO3 --> __2_ B(NO3)3 + _6__ HBr
How many particles in 2.4 moles of ammonium nitrate (NH4NO3)?
2.4 moles | 6.022 x 1023 particles = 1.44 x 1024
| 1 mole
This Costa Rican scientist designed his own Periodic Table.
Gil Chaverri Rodríguez
What are CHNOPSeS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Selenium, and Sulfur?
This is what happens to electronegativity as you go down a group (column) and why we see that trend.
What is decreasing? This is due to the increased number of electron shells that create distance between the nucleus and the electrons, decreasing their attractive forces. The top element of a group will be the most electronegative (attracting electrons) and the lowest will be the least.
____ Pb(OH)4 + ____ Cu2O --> ___ PbO2 + ___CuOH
____ Pb(OH)4 + __2__ Cu2O --> ___ PbO2 + __4_CuOH
How many particles in 24 g ammonia (NH3)?
N = 14.01 g * 1 = 14.01
H = 1.00 g * 3 = 3.00
Total molar mass = 17.01 g/mol
24 g | 1 mol | 6.022 x 1023 part. = 8.49 x 1023
| 17.01 g | 1 mol
This is the instrument Lewis played in high school.
What is the double bass (contrabajo)?
This is the heaviest element made in a typical fusion reaction inside of a star. Anything with a higher atomic weight was made in a supernova.
What is Iron?
This element has the highest electronegativity on the Periodic Table.
What is Fluorine? Neon is a Noble Gas, so it is non-electronegative. Fluorine is the most right in its period and the highest in its group, making it highly electronegative.
____ (NH4)3PO4 + ____ Pb(NO3)4 --> ___ Pb3(PO4)4 + ___NH4NO3
__4__ (NH4)3PO4 + __3__ Pb(NO3)4 --> ___ Pb3(PO4)4 + __12_NH4NO3
If a car produces 50 g of carbon dioxide per minute and it constantly runs for all of January, how many moles will it produce?
C = 12.01, O = 16.00 x 2 = 32.00; 32+12 = 44 g/mol
50 g | 60 minutes | 24 hours | 31 days | 1 mol
min | 1 hour | 1 day | January | 44 g
Final answer: 50,727 moles of CO2
This is the name of one of the original Quaker settlers of Monteverde.
Answers include:
Guindon: Lucky and Wolf ; Campbell: John, Doris, George, Ruth ; Harkey: Ted, Janice; Bert Howard, Roy Butgereit, Lawrence Osborn; Olerich: Wayne, Marge; Rockwell: Arthur, Clara, Marvin, Cecil, Elva, Ellen, Jeanette, Floyr, Paul, David, Eston, Mary, Howard, Dorothy, Leonard, Kathryn, John, Celia