Chemistry Semester #1

Unit #1

100

What is the abbreviation for milliliters?

mL

200

How many sig figs in the following number: 0.0010

2

300

Is cooking pancakes is a physical or chemical change?

chemical

400

Apply the words: molecule, atom, compound and element to the following:

N₂

molecule and element

500

Convert 2.300 kilograms per mL to grams per liter.

2.300 x 10⁶ g/L

Unit #2

100

The mass of a neutron is...

1 amu

200

What is nuclear fusion?

when two nuclei come together

300

How many protons, neutrons and Electrons are in the following isotope?

₈₂²⁰⁸Pb⁺⁴​​​​

82 protons, 78 electrons, and 126 neutrons

400

Show the alpha decay of Uranium 238.

₉₂²³⁸U ---> a⁴₂ + ₉₀²³⁴Th

500

What is the half-life of Zn-71 if you have 100.0 g and after 7.2 minutes there is only 12.5g left?

2.4 minutets

Unit #3

100

What determines how much energy an electromagnetic wave has?

the frequency

200

How many shapes are there in the f-orbitals?

7 

300

What is the unabbreviated electron configuration of halfnium?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d2

400

Why does the ionic radius decrease across a period?

More protons causes the electrons to be pulled in further. 

500

What is the most electronegative element and why is it the most electronegative?

Fluorine, it is one electron away from getting one it's first set of 8

Unit #4

100

What type of bonding is involved in fertilizer (NH₄NO₃)

ionic

200

What is the name of the following compound:

HI

hydrogen monoiodide

300

Name the following compound:

Ni₂(CO₃)₂

Nickel (II) carbonate

400

What is the lewis structure of CH₂S and what is it's geometry

H₂C=S   trigonal planar

500

(Involves mini-unit). Which of the following compounds is most likely to have the highest boiling point? Why?

H₃CH₃,  CH₃CH₂OH,  CH₃CH₂Cl

CH₃CH₂OH because it has the strongest intermolecular force which is hydrogen bonding

Unit #5

100

Write a balanced equation with states and identify the reaction type.

Aqueous Lead (II)  nitrate  reacts with aqueous potassium iodide

Pb(NO₃)_2(aq) + 2KI_(aq) → PbI_2(s) + 2KNO_3(aq)      

DR

200

Write a balanced equation with states and identify the reaction type.

Potassium chlorate with heat makes  

2KClO_3(s) → 2KCl_(s)  + 3O_2(g)     Decomposition

300

Write a balanced equation with states and identify the reaction type.

Cellulose (C₆H₁₀O₅), or wood, burns to create

C₆H₁₀O_5(s) + 6O_2(g) → 6CO_2(g)  + 5H₂O_(g)         Combustion

400

Write a balanced equation with states and identify the reaction type.

Solid phosphorus reacts with pure bromine

2P_(s) + 3Br_2(l) → 2PBr_3(g)

synthesis

500

Write a balanced equation with states and identify the reaction type.

Sodium chloride mixed with pure copper.

no reaction