Periodic Table
What is a valence electron?
Where can we find this information on the Periodic Table?
Outermost electron
It is equal to the column number #1-8 (skip the transition metals)
What is the name of Li2O
Lithium Oxide
What is the name of the type of reaction where one chemical breaks down into two or more chemicals?
Decomposition
How many protons, neutrons, and electrons are in Potassium?
P=19
N=20
E=19
What is the difference between a element, compound and a mixture?
Element = pure, all one type of atom
Compound = More than one element bonded together all same molecule
Mixture = multiple different groups of atoms. More than one compound or element not chemically bonded
Which element (P or Cl) is larger in size based on the trend for atomic radius?
Explain why the trend occurs in your answer
Phosphorus
More protons=more force=smaller atom.
Therefore, Cl is smaller than P
For the elements Calcium and Sulfur:
What is the formula when the elements bond?
What is the name when the elements bond?
CaS
Calcium Sulfide
Balance the following chemical equation?
__NH3 -> __N2 + __H2
2NH3 -> 2N2 + 3H2
What is the molar mass of Ca(OH)2
74 g/mol
How do the particles differ between a solid, liquid, and a gas?
Draw a picture to show how they are grouped and how they are moving
Solid= Definite shape, Definite volume, tightly packed
Liquid = indefinite shape, Definite volume, loosely packed
Gas = indefinite shape, indefinite volume, not packed
What are the diatomic elements and why are they important?
Br I N Cl H O F
Elements that exist in pairs i.e. O2 or Cl2
What is the formula for Iron (III) Bromide?
FeBr3
What is an equilibrium reaction? What is equal during these reactions?
A reaction that can occur forwards and backwards simultaneously.
Rate forward = Rate reversed
How many grams are in 3.2 moles of Na2S
249.6 g of Na2S
What is the electron configuration of Silicon?
1s22s22p63s23p2
Which family on the periodic table is least/not reactive?
Which family(s) on the periodic table are most reactive?
Noble Gas
Alkali Metal/Halogen
What is the name of SO2?
What is the name of N2O4?
Sulfur Dioxide
Dinitrogen Tetroxide
Predict the outcome and write a complete balanced equation when Bromine gas reacts with Lithium Iodide.
Br2 + 2LiI -> 2LiBr + I2
Calculate the Molarity when 120g of K2CO3 is dissolved in 220mL of water?
Hint:
Molarity = Moles of solid / L of liquid
3.95 M
What are two differences between Ionic compounds and Covalent compounds?
Ionic = metal and non metal, transfer electrons
Covalent = All nonmetals, share electrons, prefixes in names
Different properties!!!!
What makes an element reactive vs nonreactive.
Explain your answer
Depends on how close the element is to having a full octet (8 V.e)
8 v.e = Stable
Closer to 8 v.e = more reactive
What is the formula for Magnesium Phosphate?
Mg3(PO4)2
Balance the following equation:
__C3H6 + __O2 -> __CO2 + __H2O
2C3H6 + 9O2 -> 6CO2 + 6H2O
How many grams of Iron are needed to produce 101g of rust aka Iron (III) Oxide based on the following equation:
Iron reacts with oxygen to form Iron (III) Oxide.
4Fe + 3O2 -> 2Fe2O3
70.4 g of Iron
What is the difference between a neutral atom, an ion, and an isotope?
Calculate the protons, neutrons, and electrons of:
Pb Pb4+ Lead-209
See white board