Nomenclature
What is the name of the following ionic compound?
CaCl2
Calcium chloride
This subatomic particle is unique for every single element on the periodic table and cannot be changed without changing the element
Proton
A substance has a mass of 24 g and a volume of 13 mL. What is this substance's density? Show your work. Include units in your final answer.
1.85 g/mL
The concept of the atom was originally pitched by this philosopher
Democritus
1 millimeter (mm) is equal to how many nanometers (nm)? Use scientific notation in your answer.
1 x 10-6 pm
What is the name of the following covalent compound?
PO3
Phosphorus trioxide
This subatomic particle is not included in the calculation for an element's atomic mass
Electron
A substance has a density of 112.4 g/mL and a mass of 29.4 g. What is the volume of this substance? Show your work. Include units in your final answer.
.262 mL
This scientist determined that electrons must orbit the nucleus of an atom
Neils Bohr
127.6 kilometers (km) is equal to how many meters (m)?
127600 m
What is the compound formula for magnesium fluoride?
MgF2
This subatomic particle possesses a neutral charge and is responsible for the formation of isotopes
Neutron
A substance has a density of 13.6 g/mL. If the substance has a volume of 2.6 cm3, what is the substance's mass? Show your work. Include units in your final answer.
5.23 g
What was the major discovery that came out of Rutherford's gold foil experiment?
A dense, positively-charged nucleus for atoms
20 microliters (uL) is equal to how many milliliters (mL)?
.02 mL
What is the compound formula for Lead(IV) sulfide?
PbS2
These subatomic particles can be found in the nucleus of an atom
Protons and neutrons
An object has a mass of 12 g and a volume of 15 cm3. What is the density of this material and will it float on water? Show your work. Include units in your final answer.
.8 g/cm3 and it will float on water
How did Erwin Schrodinger's findings improve upon Bohr's initial planetary model?
Schrodinger was able to determine relative orbital size based on their distance from the nucleus
How many hours (hr) is 1,264 seconds (s) equivalent to? Show your work.
.35 hr
What is the name of the following compound?
Ammonium hydroxide
NH4OH
This subatomic particle is gained or lost in order to satisfy the octet rule. In doing so, an atom can become more positive or negative.
Electron
Water has a density of 1 g/mL and iron has a density of 7.87 g/cm3. If you are given a volume of water at 30 mL and a volume of iron at 3.96 cm3, which one weighs more? Show your work. Include units in your final answer.
Water will have a mass of 30 g and iron will have a mass of 31.2 g, so iron will weigh more.
Draw a representation of J.J. Thomson's plum pudding model. Your drawing must include positive and negative charges.
A positively charged-sphere with electrons dispersed randomly throughout
A substance has a density of 19.4 kg/kL. What would the density of this substance be in g/mL? Show your work. Use units in your final answer.
.0194 g/mL