Backbone
Periodic Table
Equations
Electrons
Vocab
Random
200
Which of the following is equivalent to 0.002100?
a. 2.1 × 10^3
b. 2.10 × 10^4
c. 2.10× 10^(–3)
d. 2.100 × 10^(–3)
e. 2.100 × 10^(–4)
2.100 × 10^(–3)
200
How many nonmetal atoms are there in the formula: NaH2PO4?
a. 1
b. 2
c. 4
d. 6
e. 7
7
200
The density of a solution is 1.293 g/mL. What is the mass of 3.0 mL of this solution (with proper
attention to correct significant digits)?
a. 0.43 g
b. 4.0 g
c. 3.9 g
d. 3.879 g
e. 2.3 g
3.9g
200
Which is the correct ground state electron configuration for a neutral scandium atom?
a. [Ar]4d3
b. [Ar]4s2 3d1
c. [Ar]3s2 3p1
d. 1s2 1p6 2s2 2p6 3s2 3p3
e. 1s2 2s2 2p6 3s2 3p6 4s2 4d
[Ar]4s2 3d1
200
When a substance undergoes a physical change
a. it always undergoes a change of state.
b. the process cannot be reversed.
c. a new substance is produced.
d. its chemical composition remains unchanged.
e. heat is always given off.
its chemical composition remains unchanged.
200
Express 23400 in scientific notation.
a. 2.34 × 103
b. 2.34 × 104
c. 2.34 × 105
d. 2.34 × 10^(–2)
e. 2.34 × 10–4
2.34 × 104
400
Which digit is uncertain in the following mass? 54.3210 g
a. 0
b. 1
c. 2
0
400
Barium and beryllium are examples of
a. alkaline earth metals.
b. rare earth metals.
c. transition metals.
d. alkali metals.
e. halogens.
alkaline earth metals
400
What temperature is 75.0°F on the Kelvin scale?
a. 24.0 K
b. 43.0 K
c. 215 K
d. 297 K
e. 348 K
297 K
400
Which is the correct ground state electron configuration for aluminum ion, Al3+?
a. 1s22s22p2
b. 1s22s22p6
c. 1s22s22p23s2
d. 1s22s22p63s23p1
e. 1s22s22p23s23p2
1s2 2s2 2p6
400
Which of the following describes a chemical change?
a. new materials are formed
b. the change is reversible
c. the change is not reversible
d. a and b
e. a and c
a and c
400
Which is a transition metal?
a. indium
b. cadmium
c. rubidium
d. selenium
e. antimony
cadmium
600
The number 78.6543 should be rounded to what value in order to have exactly 3 significant figures? a.
80.0
b. 78.6
c. 78.7
d. 78.654
e. 7.86 × 10–3
78.7
600
Which of the following would you expect to be chemically similar to chlorine?
a. Ar
b. F and Br
c. Se and Ne
d. O and Kr
e. P and S
F and Br
600
A compound is a liquid at 250°F. Which of the following could be the correct melting point and
boiling point for this material?
a. 0°C and 100°C
b. 390°C and 840°C
c. 100°C and 212°C
d. –20°C and 120°C
e. 130°C and 180°C
100°C and 212°C
600
Which of the following represents a ground state electron configuration?
a. 1s ↑↓ 2s ↑↓ 2p ↑ ↑ ↑ 3s ↑
b. 1s ↑↓ 2s ↑↓ 2p ↑↓ ↑↓ ↑ 3s
c. 1s ↑↓ 2s ↑ 2p ↑ ↑ ↑ 3s
d. 1s ↑ 2s ↑ 2p ↑ ↑ ↑ 3s ↑
e. 1s ↑↓ 2s ↑↓ 2p ↑↓ ↑ ↑ 3s ↑
1s ↑↓ 2s ↑↓ 2p ↑↓ ↑↓ ↑ 3s
600
The term “isoelectronic” refers to species that
a. have the same charge.
b. have identical mass numbers, A.
c. have identical electron configurations.
d. reside in the same period in the periodic table.
e. have the same number of protons, but different numbers of neutrons
have identical electron configurations.
600
What is the mass of 2.00 in3 of mercury? Note: The density of mercury is 13.6 g/cm3.
a. 2.67 g
b. 27.2 g
c. 69.1 g
d. 223 g
e. 446 g
446 g
800
Evaluate the following expression to the correct number of significant figures:
2.34 × 10^(–2) mL + 1.002 × 10^(–2) mL + 0.02 mL
a. 5. × 10^(–2) mL
b. 5.0 × 10^(–2) mL
c. 5.3 × 10^(–2) mL
d. 5.34 × 10^(–2) mL
e. 5.342 × 10^(–2) mL
5. × 10^(–2) mL
800
Which of the following contains exactly 44 neutrons?
a. I-131
b. Ti-22
c. Se-78
d. Sc-44
e. Ru-101
Se-78
800
What temperature change results if 10.0 g of iron absorbs 50.0 calories? Note: CFe = 0.106 cal/g⋅°C.
a. 47.2°C
b. 0.530°C
c. 0.0212°C
d. 1.89°C
e. 53.0°C
47.2°C
800
Which could be represented by the following electron configuration?
1s ↑↓ 2s ↑↓ 2p ↑ ↑ ↑ 3s
an oxygen ion in an excited state
a carbon atom in an excited state
a nitrogen atom in the ground state
a phosphorus atom in the ground state a
fluorine atom that has gained two electrons
a nitrogen atom in the ground state
800
Which of the following can be classified as a pure compound?
a. glucose, C6H12O6
b. mercury metal, Hg
c. chlorine gas, Cl2
d. rubbing alcohol, C3H8O in H2O
e. all of the above
glucose, C6H12O6
800
Put the following types of electromagnetic radiation in order of increasing energy.
I: orange light
II: UV radiation
III: red light
IV: microwaves
a.IV < I < II < III
b. IV < III < I < II
c. I < IV < III < II
d. III < IV < I < II
e. II < I < III < IV
IV < III < I < II
1000
Convert 6.0 pints to nanoliters. (Note: 1 pint = 0.473 L)
a. 2.8 × 10^(–9) nL
b. 2.8 × 10^(9) nL
c. 7.1 × 108 nL
d. 1.3 × 108 nL
e. 1.3 × 10^(–8) nL
2.8 × 10^(9) nL
1000
Put the following in order of increasing mass.
I: beryllium ion, Be2+
II: electron
III: neutron
IV: tritium, (Hydrogen with a mass number of 3)
a. II < III < IV < I
b. II < III < I < IV
c. I < IV < III < II
d. III < IV < I < II
e. IV < III < II < I
II < III < IV < I
1000
How much heat (in kcal) is released when 125 g of water cools from 90.0ºC to 9.5ºC? (Note: the
specific heat value for water is 1.00 cal/g⋅°C.)
a. 0.644 kcal
b. 1.55 kcal
c. 12.5 kcal
d. 2.44 kcal
e. 10.1 kcal
10.1 kcal
1000
Which represents the electron configuration of a neutral sodium atom in an excited state?
a. [He]2s2 2p6 3s1 3p1
b. 1s2 2s2 2p6
c. 1s2 2s2 2p5 3s1
d. [Ne]3p1
e. [Ne]3s2
[Ne]3p1
1000
Which of the following would be described as a heterogeneous mixture?
a. air, a mixture of O2, N2, CO2 and other gases
b. propane gas, C3H8
c. 95% ethyl alcohol (C2H6O dissolved in water)
d. elemental sulfur, S8
e. none of the above
none of the above
1000
Draw the electromagnetic radiation chart
- You can draw it either way but make sure to include which side has long/tall waves with low energy and High energy with short waves
Gamma Ray - Xray - UV - Visible - Infared - Radiowaves
