The statement, Matter is neither creater nor destoryed is called
Law of Conservation of Mass
Law of Definite Proportions
Dalton's Atomic Theory
The Scientific Method
Law of Multiple Proportions
All samples of a given compound, regardless of their source or how they were prepared, have the same proportions of their constituent elements. Which law does this refer to?
Law of the Conservation of Mass
Law of Modern Atomic Theory
First Law of Thermodynamics
Which of the following is an example of the law of multiple proportions?
A sample of chlorine is found to contain three times as much Cl-35 as Cl-37
Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 g O :1 g C and 2.66 g O :1 g C
Two different samples of table salt are found to have the same ratio of sodium to chloride
The atomic mass of bromine is found to be 79.9 amu
Nitrogen dioxide always has a mass ratio of 2.28g O : 1 g N
Calculate the atomic mass of element "X," if it has 2 naturally occurring isotopes with the following masses and natural abundances. X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12%
46.26 amu
45.91 amu
46.34 amu
46.84 amu
44.99 amu
122 Given the element X 82 How many electrons does this element have? How many protons? How many neutrons? What is the element?
How many iron atoms are contained in 354 g of iron?
2.62 × 1025 Fe atoms
2.13 × 1026 Fe atoms
4.69 × 1024 Fe atoms
3.82 × 1024 Fe atoms
9.50 × 1022 Fe atoms
Determine the density of an object that has a mass of 149.8 g and displaces 12.1 mL of water when placed in a graduated cylinder.
8.08 g/mL
1.38 g/mL
12.4 g/mL
18.1 g/mL
11.4 g/mL
What answer should be reported, with the correct number of significant figures, for the following calculation? (433.621 - 333.9) × 11.900
1.19 × 103
1.187 × 103
1.1868 × 103
1.18680 × 103
1.186799 × 103
How many significant figures are in the measurement, 0.00049320 g?
4
5
6
7
8
Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 1014 Hz.
229 nm
436 nm
206 nm
485 nm
675 nm
Calculate the energy of the orange light emitted, per photon, by a neon sign with a frequency of 4.89 × 1014 Hz.
3.09 × 10-19 J
6.14 × 10-19 J
3.24 × 10-19 J
1.63 × 10-19 J
5.11 × 10-19 J
How many orbitals are contained in n=1 (), in n=2 (), in n=3 (), in n=6 ()
Determine the energy change associated with the transition from n=2 to n=5 in the hydrogen atom.
-2.18 × 10-19 J
+6.54 × 10-19 J
+4.58 × 10-19 J
-1.53 × 10-19 J
+3.76 × 10-19 J
Predict the charge of the ion formed from: Al Na Br Mg N O Ne
Predict the charge of the ion formed from: Al 3+ Na 1+ Br 1- Mg 2+ N 3- O 2- Ne won’t form ion Which of the above are metals?
Write the electron configurations for: Se Mn2+ Fe2+ S
Give the number of core electrons and valence electrons for Se and Sulfur
Write an orbital diagram for oxygen
No two electrons can have the same four quantum numbers is known as the
Pauli exclusion principle.
Hund's rule
Aufbau principle
Heisenberg uncertainty principle
Only two electrons, with opposing spins, are allowed in each orbital is known as the
Pauli exclusion principle
When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as
Place the following elements in order of increasing atomic radius P Ba Cl
Ba < P < Cl
P < Cl < Ba
Cl < P < Ba
Cl < Ba < P
Ba < Cl < P
Place the following in order of increasing radius Br⁻ Na⁺ Rb⁺
Br⁻ < Rb⁺ < Na⁺
Na⁺ < Rb⁺ < Br⁻
Rb⁺ < Br⁻ < Na⁺
Br⁻ < Na⁺ < Rb⁺
Rb⁺ < Na⁺ < Br⁻
Write an reaction equation for the second electron affinity of oxygen
Write a reaction equation for the second ionization of magnesium
Place the following in order of increasing IE1. N F As
N < As < F
As < N < F
F < N < As
As < F < N
F < As < N
Place the following in order of decreasing metallic character.
P > As > K
As > P > K
K > P > As
As > K > P
K > As > P
