Matter
Energy
Atomic Structure
Periodic Table
Random
100
Define aqueous
homogeneous solution in water.
100
Name the phase change when a gas turns into a solid
Deposition
100
What is the charge of an electron
negative (-1)
100
Name one of the metalloids
B, Si, Ge, As, Sb, or Te
100
What is the number of valence electrons in an atom in the ground state with an electron configuration of 2-8-18-3?
3
200
In which sample of matter can the proportion of its components be varied?
Cl2(g)
Br2(
)KCl(s)
KBr(aq)
4. KBr(aq)
200
What type of energy is changing during a phase change?
Potential Energy
200
Which subatomic particles contribute to the mass of an atom?
Protons and neutrons
200
Explain why Neon is a nonreactive element
full valence shell
200
Differences in which property allow the separation of a mixture of 2-propanol and water by distillation at 1.0 atm?
boiling point
300
On your white board, draw a particle diagram of a monatomic gas with at least 6 particles.
answers will vary
300
A 30oC cube is submerged in 10oC water. State the direction of heat flow between the cube and water
heat flows from cube to water.
300
On your white board provide an excited state electron configuration for fluorine
answers vary
300
What is the electron configuration of K+1
2-8-8
300
CO2(s) + energy → CO2(g)
Describe the change in entropy for the reaction provided.
low --> high
400
A solution is made by completely dissolving a sample of sodium hydrogen carbonate in water. This solution is classified as what kind of mixture?
Homogeneous
400
What is the amount of heat that must be absorbed to increase the temperature of a 130.-gram sample of water from 20.0°C to 50.0°C?
1.63 × 104 J
400
Explain how light is produced from an excited atom.
Light is emitted as electrons return to the ground state from the excited state.
400
Explain why a metal atom is larger than a metal ion
because it loses an electron shell
400
Explain why an atom of C-12 in the ground state and an atom of C-13 in the ground state are defined as isotopes of carbon
same number of protons (atomic number) different number of neutrons (mass)
500
On your white board, draw a particle diagram of a diatomic gas mixed with a gaseous compound
answers will vary
500
What is the amount of heat absorbed to completely melt 26.2 grams of H2O(s) at 0°C?
8.75 × 103 J
500
What is the average atomic mass of an element with two isotopes: X-34 and X-36, and percent abundances of 40% and 60% respectively.
35.2 amu
500
Describes the general trends in electronegativity and atomic radius as the first seven elements in Period 3 are considered in order of increasing atomic number.
E-neg: increases
radius: decreases
500
In the wave-mechanical model, which term identifies a region in an atom of lithium that is the most probable location of electrons in the ground state?
orbital