Atomic Structure
The atomic number of oxygen
What is 8?
The direction of the ionization energy trend.
What is increases as you travel up and to the right on the periodic table?
The difference between a cation and an anion
What is cations are positive ("pawsitive") and anions are negative?
The wavelength of a photon with a frequency of 2.5 x 1012 Hz
What is 120 μm?
The number of electrons that S has.
What is 16?
The number of protons in (imagine this is an element on the periodic table):
16
S
32.06
What is 16?
The largest atom:
P or O
What is P?
The name of this ion:
Cl-
What is chloride?
How many nanometers are in 312 km? Is the exponent going to be positive or negative?
What is 3.12 x 1014?
The electron configuration of sodium.
What is 1s22s22p63s1?
The number of protons Li2+ has.
What is 3?
The atom with the largest Zeff:
Mg or S
What is S?
The ionic charge this atom likely to have:
Mg
What is 2+?
How many atoms of calcium are in 2 mL of a 3.6 M Ca3P2 solution?
1.30 x 1022
The condensed electron configuration of Te.
What is [Kr]5s24d105p4
The mass of one mole of nitrogen
What is 14 grams?
The larger atom:
O2- or Ne
What is O2-? Same number of electrons, but O has less protons to pull those electrons in.
The formula of this compound:
magnesium fluoride
What is MgF2?
In hydrogen atom A, an electron drops from the n=4 to the n=3 level. In hydrogen atom B, an electron goes from n=2 to n=3. Which of the below options is MOST LIKELY to correspond to the change in energy for each atom?
1.3 x 10-19J 2.1 x 10-19J -1.3 x 10-19J -2.1 x 10-19J
For atom A, -1.3 x 10-19J makes the most sense, since the gap between n=4 and n=3 is small than the one between n=2 and n=3, and since the electron is going to a lower energy level the change in energy will be negative. For atom B, 2.1 x 10-19J makes the most sense.
The number of valence electrons that phosphorous has.
What is 5?
The number of electrons in 1122 Na+1
What is 10?
The larger ion:
Cl- or K+
What is Cl-? Because both ions are isoelectronic. K has more protons, so it will pull its electrons closer and therefore be smaller.
The name of this compound:
Fe2O3
What is iron (III) oxide?
The energy of a photon emitted when an electron goes from n = 3 to n = 1 in a helium atom
What is 7.75 x 10-18?
The condensed electron configuration of Ir.
What is [Xe] 6s24f145d7?