SI prefixes, conversions, dimensional analysis
Which of these conversions is correct?
a) 10^3 L = 1 mL
b) 10^-6 uL = 1 L
c) 1 nL = 10^9 L
d) 10^-3 kL = 1 L
d) 10^-3 kL = 1 L
What is the energy of a photon with the frequency of 90 MHz
5.96 x10^-26 J
Which of the following has the smallest atomic radius
a) Ba
b) Ca
c) As
d) Br
d) Br
What is the correct condensed electron configuration for Tin [Sn]?
a) [Ar] 5s2 4d10 5p2
b) [Kr] 5s2 4d10 5p2
c) [Kr] 5s2 4d8 5p4
d) [Kr] 5s2 4d4 5p6
b) [Kr] 5s2 4d10 5p2
What charge would you predict element 120 to form, if it were to form an ion?
a. +2
b. +1
c. 0
d. -1
e. -2
a) +2
If the temperature of a sample is -35°F, what is the corresponding temperature on the Kelvin scale? (HINT: **WATCH YOUR SIGNIFICANT FIGURES**)
°F-32)/1.8 = °C
K = 273.15 + °C
a) 236.15 K
b) 236.2 K
c) 236 K
c) 236 K
this will highly be on your exam PLEASE STUDY and understand significant figure rules
Suppose a blue light is emitting photons with a wavelength of 470 nm. What is the energy, in J, of one photon with this wavelength?
4.23 x10^-19 J
Which of the following elements are Alkaline Earth metals?
a) K & Ca
b) Rb & Cs
c) Ba & Mg
d) As & P
c) Ba & Mg
How many electrons can a full p orbital hold?
a) 2
b) 6
c) 8
d) 10
b) 6
Neutral Isotopes have...
a) the same number of protons and neutrons but different electrons
b) the same number of neutrons and electrons but different protons
c) different number of neutrons, but same protons and electrons
d) fake elements that are made up
c) different number of neutrons, but same protons and electrons
The density of an atom is 4.5 kg/m3. What is the density in lb/ft3? 1 kg =2.205 lb, 1 m = 3.28 ft
(ignore sig figs, the most important part here is you knowing how to get the answer)
0.28 lb/ft^3
or 0.281 lb/ft^3
Which of the following is a possible set of quantum numbers for a 4f orbital?
a. n = 4, l = 1, ml = -1
b. n = 4, l = 2, ml = 4
c. n = 4, l = 3, ml = 0
d. n = 4, l = 1, ml = 2
c. n = 4, l = 3, ml = 0
How many unpaired electrons will there be in a neutral Nitrogen atom?
a) 2
b) 3
c) 6
d) 4
b) 3
Which atom is paramagnetic ?
(draw out their electron configurations)
a) Mn
b) Kr
c) Ca
d) Zn
a) Mn
A student writes down 5 measurement values from her lab. The numbers were 1.551 cm, 1.548cm, 1.549 cm, 1.552 cm, and 1.550cm. The literature accepted values were 1.600-1.620cm. Were the student's results ...
a) Less precise than the known values.
b) Precise but not accurate.
c) Precise and accurate.
d) Accurate but not precise
b) Precise but not accurate.
The highest point of Mt Everest is 20.5 km. What is this depth in ft? (hint: 1 mile = 5280 ft, 1 mile = 1.609 km)
(don't stress about sig figs)
67,272 ft
67,200 ft
Light emitted from a source has a photon energy of 3.61 × 10^-19 J.
What is the wavelength of this light in nm?
551 nm
Which of the following elements have the MOST similar chemical/physical properties?
a) Ne & Kr
b) N & O
c) Be & B
d) Ga & Ge
a) Ne & Kr
Which of the following quantum numbers are NOT allowed?
a) n=3, l=2, Ml= -1, Ms= +1/2
b) n=4, l= 0, Ml= -1, Ms= +1/2
c) n=3, l=1, Ml= -1, Ms= -1/2
d) n=4, l=0, Ml= 0, Ms= -1/2
b) n=4, l= 0, Ml= -1, Ms= +1/2
A sodium ion differs from a sodium atom in that the sodium ion...
a) has fewer electrons
b) is an isotope of sodium
c) exists only in sodium
d) has a negative charge on it's nucleus
a) has fewer electrons
A patient is prescribed antibiotic for a virus thats dose is 80.5 mg/kg body mass daily. The drug contains 250mg/mL and is to be taken once a day. The patient weighs 125 lbs. How many mL of antibiotic should be in the dose? (1 kg = 2.205 lbs)
a) 20.4 mL
b) 18.3mL
c) 45.2mL
d) 28.5mL
b
Which transition in a hydrogen atom involves the emission of the longest wavelength?
a) n = 1 to n = 2
b) n = 2 to n = 1
c) n = 4 to n = 3
d) n = 3 to n = 4
c) n = 4 to n = 3
Select the correct ranking of the following elements from lowest to highest first ionization energy: Sc, K, Si and O
a) K < Sc < Si < O
b) O < Si < Sc < K
c) K < Si < Sc < O
d) O < Sc < Si < K
a) K < Sc < Si < O
In lab, you create a new heavy atom with the atomic number 125. Which category would it belong to?
a) Noble Gas
b) Transition metals
c) Alkali Metals
d) Alkaline earth metals
b) Transition metals
Which element is more electronegative than germanium (Ge) and less electronegative than sulfur (S)?
a) chlorine
b) silicon
c) tin
d) oxygen
b) silicon