Property Matters
Classy Chemistry
Atom Anatomy
History Mystery
Holy Moly!
100
What state of matter has a definite volume, but NO defined shape?
Liquid
100
This type of substance has a uniform composition and uniform properites.
Pure substance
100
An atom is composed of what three subatomic particles?
Proton, neutron, and electron
100
Who proposed the Solid Sphere Model of the atom?
John Dalton
100
How many particles are found in 1 mole of any substance?
6.022 x 1023 particles
200
This is the study of matter and energy transfer.
Physical Chemistry
200
This type of element has characteristics of both metals and nonmetals.
Metalloid
200
What are isotopes?
Elements with the same number of protons, but differing number of neutrons.
200
Ernest Rutherford discovered which particle by performing his famous Gold Foil Experiment?
Proton
200
What is the molar mass of Calcium (round to 2 decimal places)?
Use correct units to get the answer correct!
40.08 g/mol
300
An _________ reaction releases energy & an ___________ reaction absorbs energy.
exothermic; endothermic
300
Name the two types of mixtures and state how they are different.
Homogenous - Uniform
Heterogenous - Non-uniform
300
Atomic radius is measured from ___________ to ____________.
center of the nucleus; outermost electron cloud/orbital
300
The electron was discovered by using what type of device?
Cathode-Ray Tubes
300
Convert 25 g Li to moles (round to 2 decimal places).
Show all of you work and use correct units!
3.60 mol Li
400
This type of property is visible and depends on the amount of matter given.
Extensive properties
400
What is chromatography?
The process of separating solutions by differing densities.
400
Average atomic mass considers all _______________ of an element
natural isotopes
400
Which scientist developed the currently accepted model of the atom? Which model is this?
Erwin Schrödinger; Quantum (Electron Cloud) Model
400
Calculate the number of molecules of salt (NaCl) in 2.3 moles (round to 3 sig figs).
Show all work and use correct units!
1.39 x 1024 molecules NaCl
500
Give one example each of extensive properties, intensive properties, and physical properties.
Extensive: Volume, Mass, Amount of substance, Length, Total Energy, etc.
Intensive: Melting point, Boiling point, Density, Ability to conduct electricity, Pressure, Color, etc.
Physical: Grinding, Melting, Boiling, Cutting, Change of state, Viscosity, Solubility, Brittleness, Conductivity, etc.
500
Name the four types of mixture separation techniques.
Filtration, Chromatography, Centrifuge, Vaporization
500
There are two main isotopes of chlorine. Chlorine-35 makes up 75.77% of naturally occurring chlorine and has a mass of 34.97 amu. Chlorine-37 accounts for 24.23% of naturally occurring chlorine and has a mass of 36.97 amu. Based on this information, calculate the average atomic mass of chlorine.
Show all work!
(34.97 amu x 0.7577) + (36.97 amu x 0.2423) = 35.45 amu
500
Draw an example of the Nuclear Model of the atom.
Bonus: How do electrons behave according to this model?
Bonus: Electrons move in random, elliptical orbits around the nucleus.
500
How many grams are found 3.34 x 1023 molecules of glucose (C6H12O6)?
Show all work and use correct units!
99.92 g C6H12O6