Unit 1
Unit 2
Unit 3
Units 3b and 4
Mystery
100
How many sig figs are in 0.030440 g?
5
100
What is an isotope?
atoms of the same element with diffrent numbers of nuetrons
100
Which type of light has a higher frequency, infrared or ultraviolet?
ultraviolet
100
A neutral iron atom loses two electrons. How would you name this ion?
Iron (II)
100
Round 0.0999765 to three significant figures
0.100
200
What would we call this kind of mixture?
Homogeneous
200
What scientist discovered electrons?
Thomson
200
What element matches the above electron diagram?
Bromine (Br)
200
Does atomic radius increase or decrease across a period (left to right)? Does it increase or decrease from top to bottom of a group?
Decreases left to right across a period, increases down a group
200
For each change, state whether is is Physical or Chemical:
1. Mr. Kallen toasts some bread
2. Mr. Kallen spreads peanut butter and jelly on the bread
3. Mr. Kallen cuts the sandwich in half
4. Mr. Kallen eats the sandwich and digests it
1. Chemical
2. Physical
3. Physical
4. chemical
300
What is an accurate measurement for the volume of this liquid?
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23.9 mL, 24.0 mL, 24.1 mL
300
Based on the above isotope symbol, how many neutrons does this atom have?
8 neutrons
300
Calculate the frequency of light that has a wavelength of 405 nm
c = 3.00 x 10^8 m/s ; 1 m = 10^9 nm
7.41 x 1014 Hz
300
What numeric charge would an ion of Phosphorus take?
How many total electrons does it now have?
What would you name this ion?
-3, 18 total electrons, Phosphide
300
What is zinc's noble gas configuration?
In addition, what charge does it always take?
[Ar] 4s2 3d10
+2
400
Convert 0.000567 Megaliters (ML) to milliliters (mL)
1 Mega unit = 106 base units
567,000 mL OR 5.67x10^5 mL
400
What 3 big ideas did the Gold Foil Experiment add to our understanding of the atom?
Atoms are mostly empty space, there is a positive core at the center of the atom (nucleus), and electrons exist outside of the nucleus
400
What is the full electron configuration AND Noble Gas configuration of Strontium (Sr)?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
[Kr] 5s2
400
How many electrons would Oxygen gain or lose? Which Noble Gas is it isoelectronic with?
Gain 2, neon
400
Estimate the average atomic mass of this element. Additionally, what element should this be?
About 91 amu, Zirconium
500
What is the mass in kilograms of a 3x3x3 meter cube with a density of 250 kg/m3?
Hint: what version of the density equation do you need to use?
6750 kg
500
An element has 2 isotopes. The first isotope has a mass number of 10 and has an abundance of 19.8%. The second isotope has a mass number of 11 and has an abundance of 80.2%. What is the average atomic mass?
10.8 amu
500
What is the wavelength of light (in nm) with an energy of 3.14 * 10-20 J?
E = h*c/λ ; h = 6.626 x 10-34 J s
6330 nm
500
Rank the following elements in order of increasing electronegativity: iron, oxygen, phosphorus, and cesium
Cs < Fe < P < O
500
A sample of tetrachloroethene has a mass of 0.00452 kilograms and a volume of 2.79 mL. What is the density of the sample in g/mL?
1.62 g/mL