Isotopes and electron configuration
On the periodic table, which direction(s) does electronegativity increase?
Up and to the right
Amount of valence electrons in Ar
8
What is the molar mass of Chlorine?, Vanadium?
Cl=35.45g/mol, V=50.94g/mol
suppose a sample of gas is compressed (volume reduced) what will happen to the pressure of that gas?
List the equation that ecpresses this relationship
the pressure will increase due to increased collisions with the wall.
PV=nRT --> P=nRT/V
Increased frequency is related to increased _____
Energy
This isotope has 5 protons and 6 neutrons.
Boron 11
The calulation for core charge
#protons - #of inner electrons = core charge
Calculate the amount of atoms in 0.4 moles of Ar
2.41 x 1023 atoms
Which is NOT a principle of Kinetic Molecular Theory?
a) collisions are elastic ( no loss of energy )
b) gas particles are in constant motion, and travel in a straight line
c) kinetic energy depends on pressure and temperature
d) pressure comes from collisions with the wall
c) kinetic energy depends on pressure and temperature
Equation: K.E.avg = (3/2)*RT <-- No P variable
which energy level change has the longest wavelength?
a) n = 2 to n = 4
b) n = 6 to n = 1
c) n = 2 to n = 3
d) n = 5 to n = 8
n = 2 to n = 3
What element has this electron configuration: [He]2s2 2p1
Boron
Which of these elements has the highest ionization energy
a) Si
b) O
c) N
d) Fr
N
Convert 15 nm into miles.
1nm = 1 x 10-9m
1km = 1000m
1mile = 1.61km
15 nm =9.32 x 10-12miles
Which gas law relates the volume of gas to its temperature?
Charles law
V1/T1 = V2/T2
What's the wavelength (in nanometers) of a photon with an energy of 6.2 x 10-19 J?
321 nm
Noble gas configuration for P
[Ne] 3s2 3p3
The amount of valence electrons on the element [Xe]6s24f145d106p5
7
calculate the mass in grams of 7.5 x 107 moles of neon (Ne)
1.5 x 109g
a propane tank has a pressure of 70psi. what is this pressure measured in mmHg?
1atm = 14.7psi = 760mmHg
3619.05mmHg
What is the energy (E) and frequency (v) of a photon of green light with a wavelength of 500nm?
E = 3.98 x 10-19 J
v = 6 x 1014 Hz
Silver has two isotopes, Silver-107 and Silver-109. the average atomic mass of Silver is 107.87amu. calculate the percent abundance for each isotope:
Silver-107: 106.91amu
Silver-109: 108.90amu
Silver-107: 51.84
Silver-109: 48.16%
Which of these elements has the highest atomic radius
a) Li
b) Ga
c) Db
d) Ra
Ra
calculate the molar mass of vitamin C: C6H8O6
176.12g/m
It has been observed that at 1.00 atm of pressure, and a temperature of 298.15K, one gas mole occupies a volume of 22.4L. Calculate the value for the gas constant R including units.
0.0751 atm⋅L/mol⋅K
What is Donald Duck's middle name?
Fauntleroy