What is a homogeneous mixture? Provide an example.
It is a type of mixture whether made up of solids, liquids, or gases where all of the components are distributed evenly throughout, so that the mixture appears completely uniform.
How do you determine how many valence electrons an element has? Provide an example such as "Bromine has ____ valence electrons."
The group number reflects how many valence electrons an element has. Transition metals are an exception to this rule.
Bromine has 7 valence electrons.
What is an ion?
An ion has a different number of protons than it does electrons, thus giving it a charge.
(It still has the same number of protons as the neutral atom of that element).
What is the name of CaBr2?
Calcium Bromide
What is Miss M studying to be after she graduates from WMU?
A teacher
(specifically a science teacher/chemistry teacher/biology teacher)
What is a heterogeneous mixture? Provide an example.
It is a type of mixture whether made up of solids, liquids, or gases where the mixture does not appear completely uniform.
What part of the atom does the atomic number of an element represent?
It tells how many protons that element has.
What is an isotope?
Different variations of atoms for a specific element that all have the same number of protons, but different numbers of neutrons, thus giving each isotope a different mass number.
What is the name of Br2O5?
Dibromine pentoxide
What types of elements typically form cations?
Bonus Question (100 Points): What is Miss M's way of remembering what the charge of a cation is?
Metals
Bonus Question: Cat-ions have a paw-sitive charge
True of False: Certain chemical reactions allow you to obtain more matter as products than what you started with as reactants.
False
Matter cannot be created or destroyed; therefore, the amount you start with in the reactants, is the total amount that you'll have as products in the end.
List the number of protons, total electrons, and number of valence electrons that a neutral magnesium atom has.
A neutral magnesium atom as 12 protons, 12 total electrons, and 2 valence electrons.
Carbon-14 has how many protons, neutrons, and electrons?
6 protons
8 neutrons
6 electrons
What is the chemical formula of copper (II) phosphate?
Cu3(PO4)2
Daily Double (This question is worth double if you get it right):
What is Miss M's full last name? ...If you get close, I'll count it :)
Miss Mroczek (pronounced Muh-row-zik)
... It's Polish in case anyone is curious :)
What is the difference between a physical change and a chemical change?
A chemical change involves changing the identity of the substance itself why a physical change just alters the form that the matter is in and is typically reversible.
List the number of protons, total electrons, and number of valence electrons that a neon atom has.
Bonus Question (100 points): Is this element likely to form an ion? Why or why not?
A neon atom has 10 protons, 10 total electrons, and 8 valence electrons.
Bonus Question: It is not likely because it already has a complete outer shell of electrons (8 valence electrons).
What type of element makes up a covalent compound? What happens to the electrons within a covalent bond?
A covalent compound is made up of non-metals.
Electrons are shared within a covalent bond.
Write the name of Ti2(SO4)3?
Titanium (III) Sulfate
What trick did Miss M teach everyone to figure out whether an atom will lose or gain electrons when forming its ion?
Remember that atoms want to have 8 valence electrons in their outer shell, so think about if it would be easier for an atom to gain or lose electrons to obtain a complete outer shell. Ex:) If the atom has 2 valence electrons, it's easier to give away 2 rather than try to gain 6 electrons, but if the atom has 7 valence electrons, then it's easier to gain 1 electron than to try and lose 7.
What is the difference between a mixture and a compound?
A compound is made up of elements that are chemically bonded together, while a mixture is not. Therefore, a mixture can be separated physically and a compound cannot.
List the number of valence electrons that a nitrogen atom has. What type of ion would it form (cation or anion) and what would its charge be?
Nitrogen has 5 valence electrons and forms an anion with a -3 charge.
What types of elements make up an ionic compound? What happens to the electrons within an ionic bond?
An ionic compound is made up of a metal and a non-metal.
The electrons are transferred from the metal to the non-metal within an ionic bond.
What is the name of H3PO4?
Bonus Question (100 points): What phrase did Miss M tell everyone to help them remember how to name acids that contain polyatomic ions ending in -ate?
Phosphoric Acid
Bonus Question: "I ate it, and it was icky"... so acids that contain polyatomic ions ending in -ate, are named so that the new ending is changed to -ic.
Out of all of the periodic trends, what is Miss M's favorite?
Electronegativity