Definitions
Lab Equipment
Physical or Chemical
Periodic Table
Atomic Models
Calculations
Moles!
Assorted Topics
100
Define chemistry
The study of matter and its properties
100
Graduated Cylinder
100
Ice Melting
Physical change
100
How many protons are in Bromine?
35 protons
100
What did Rutherford discover about the atom?
The nucleus!
100
How many cm are in 47.9 in?
100
Calculate the molar mass of NaCl.
58.44 g/mol
100
Classify the following as a substance or mixture. If it's a substance classify it as an element or compound. If it's a mixture classify it as homogeneous or heterogeneous.
IceSubstance, compound
200
Define accuracy
How close your data is to the known/actual value
200
Crucible & lid
200
Mixing baking soda and vinegar
Chemical change
200
How many neutrons are in Polonium-210?
126 neutrons
200
Who came up with the original idea of atoms?
Democritus
200
How many mm in 17 ft?
200
Calculate the molar mass of ethanol (C2H6O).
46.08 g/mol
200
Classify the following as a substance or mixture. If it's a substance classify it as an element or compound. If it's a mixture classify it as homogeneous or heterogeneous.
Chocolate Chip Cookie
Heterogeneous Mixture
300
Define proton
A positive subatomic particle located in the nucleus that determines the identity of the atom
300
Watch glass
300
Cracking eggs
Physical change
300
How many electrons are in an atom of Scandium?
21 electrons
300
What is the currently accepted model of the atom?
The Schrodinger model where electrons are located in particular areas called clouds.
300
How many meters per second is 23 miles per hour?
300
How many grams are in 12.6 moles of H2O?
300
Classify the following as a substance or mixture. If it's a substance classify it as an element or compound. If it's a mixture classify it as homogeneous or heterogeneous.
Brass
Homogeneous mixture
400
Define intensive property
A property that does not depend on the amount of matter present.
400
Dropper
400
Baking a cake
Chemical change
400
What element has 117 protons?
Tennessine
400
Draw JJ Thomson's model of the atom.
400
A car is traveling 28 miles per hour, how many meters will it travel in 45 seconds?
400
How many atoms are in 6.74 moles of Na?
400
What are the steps of the scientific method?
Question/Observation, Hypothesis, Experiment, Analyze, Draw conclusions
500
Define law of conservation of matter
Matter cannot be created or destroyed.
500
Crucible Tongs
500
Fireworks
Chemical change
500
Write in isotope symbol notation the element that has 61 protons and 84 neutrons.
500
What model of the atom do we most commonly use in a chemistry classroom?
The Bohr model
500
You discovered a new element called Washtonian. It has 3 isotopes:
Washtonian- 68 (23.98% abundance)
Washtonian-71 (54.13% abundance)
Washtonian-72 (21.89% abundance)
70.50 amu
500
How many molecules of CO2 are in 7.98 g of CO2?
500
You did a lab and found the density of a substance to be 8.43 g/mL. The actual density is 7.98 g/mL. What is the percent error?
5.6%