Atomic Structure
How many protons are found in a Carbon-14 atom?
Six (6)
What is the shape of the structure that has 2 electron groups attached to the central atom and none of them are lone pairs?
linear
Which gas law addresses the relationship between pressure and temperature?
Gay-Lussac's Law.
17 degrees Celsius is what temperature in Kelvin?
290 K
39.9% C
Draw the Lewis Structure for sulfur.
See teacher's whiteboard.
What is the shape of the sulfate ion?
tetrahedral
Why must temperatures be converted from Celsius to Kelvin for gas law calculations?
At 0 degrees Celsius, there is still particle movement, therefore there is still gas pressure. The graph of pressure v. temperature would start at the origin (O, O) if temperature was in Kelvin because of absolute 0.
Standard pressure in pounds per square inch (psi) is what value?
14.7 psi
Name the prefix used for 7 atoms in a covalent molecule.
hepta-
How much Uranium-238 will remain after a 100 g sample undergoes 4 half-lives.
6.25 g
They decrease bond angles because of the lone pairs repel bonded atoms.
If the volume of a cylinder containing oxygen gas were to be double, what would happen to the pressure?
Pressure would be cut in half.
Describe in words how to convert grams of water into moles of water.
First, determine the molar mass of water by adding up the molar masses of 2 Hydrogens and 1 oxygen. Then, divide the grams of water given to you in the problem by the molar mass you determined in step one.
How are subscripts determined in an ionic compound?
Subscripts are determined by the balancing of charges. There must be enough cations giving away electrons to satisfy the anions need to accept electrons.
What is the half-life of the unknown element that decays to 3.125% of the original sample in 17 days?
3.4 days
What is the shape of a compound that has 4 electron groups attached, including one lone pair.
trigonal pyramidal
Charles's Law states that as the temperature of a gas decreases, the volume of the gas will _______.
decrease
How many grams of carbon dioxide are in 3 moles?
132.03 g
Why do atoms bond with each other to create molecules and compounds?
To satisfy the octet rule for maximum stability.
Draw the Lewis Structure for a phosphide ion.
See teacher's whiteboard.
What shape does the carbonate ion have?
Trigonal planar
What occurs at the triple point?
All three states of matter exist in equilibrium.
How many atoms are in 22.99 g of Na?
6.02 x 1023 atoms of Na
Name the 7 diatomic molecules.
nitrogen, oxygen, fluorine, chlorine, bromine, iodine, and hydrogen