Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
100
Which of the following is a homogeneous mixture: a) soil b) beef stew c) salt water d) sand and water
c) salt water
100
Chlorine boils at 239 K. What is the boiling point of chlorine expressed in degrees Celsius?
-34 degrees Celsius
100
How many electrons in Calcium?
20 electrons
100
What is the electron configuration of Chlorine?
1s^2 2s^2 2p^2 3s^2 3p^5
100
Which atom has a greater ionization energy: Magnesium or Phosphorous?
Phosphorous
200
Which of the following is a heterogeneous mixture: a) air b) salt water c) soil d) steel
a) soil
200
What is the temperature of absolute zero measured in degrees Celsius (not Kelvin)?
-273 degrees C
200
How many neutrons in Uranium-238 (AN=92)
146 neutrons
200
What is the electron configuration for Iron?
[Ar] 3d^6 4s^2 or 1s^2 2s^2 2p^2 3s^2 3p^6 3d^6 4s^2
200
Order these elements from largest size to smallest: Silicon, Tin, Germanium, Carbon
Tin, Germanium, Silicon, Carbon
300
Which of the following is a heterogeneous mixture: a) vinegar and water b) milk c) oil and vinegar d) air
oil and vinegar
300
The density of mercury is 5.427 g/mL. If the density of water is 1.0 g/mL, will mercury float or sink in water?
sink
300
Calculate the number of neutrons in Pb-210 (Pb-210 is an isotope of lead, and the number 210 is the atomic mass number for that isotope)
What is 128 neutrons
300
How many electrons are in the second energy level of a Phosphorus atom?
5 electrons
300
What is electronegativity?
What is The tendency of an atom to attract an electron.
400
Which of the following is a chemical change: a) mixing two cheeses in a bowl b) melting cheese c) fermenting cheese d) grating cheese
c) fermenting cheese
400
Why is the density of metal greater than the density of water?
What is Because the molecules of metal are closer together than water molecules. Also, metal's atoms are heavier than waters molecules, because most metal atoms have a large atomic mass
400
How is the number of neutrons in the nucleus of an atom calculated? a) Add the mass number to the number of electrons. b) Subtract the number of electrons from the number of protons. c) Add the number of electrons and protons together. d) Subtract the number of protons from the mass number.
d) Subtract the number of protons from the mass number.
400
How many valance electrons does elements in group 2 (second column) have?
2 valance electrons
400
Which is larger: A chlorine atom or a chlorine anion?
What is chlorine anion
500
What distinguishes a substance from a mixture: a) Mixtures are groupings of elements b) Substances are compounds, and mixtures are not. c) The composition of substances cannot vary, while the composition of mixtures can.
c) The composition of substances cannot vary, while the composition of mixtures can
500
If the temperature of a piece of steel decreases, what happens to its density? Why?
increases, because the steel contracts (volume decreases) and density = mass/volume
500
How many "times" more massive is a proton than an electron?
1,833 times
500
What is an atomic orbital?
it describes the probability of finding an electron at various locations around the nucleus?
500
Why do atoms get smaller as you move to the right on the periodic table. Why does ionization energy increase as you move to the right along the periodic table?
What is Because the stronger nucleus pulls the electrons closer together, causing the atom to be smaller and more energy required to ionize the atom
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