What are the four indicators of a chemical change?
Color Change, Change in Temperature, Forms a Gas, Forms a Precipitate.
Identify the following items as Ionic, Covalent, or Metallic:
~ Hydrogen (H2)
~Salt ( NaCl)
~ Hydrochloric Acid ( HCl)
~ Brass (Cu + Zn + Pb)
~ Magnesium oxide ( MgO)
Covalent
Ionic
Covalent
Metallic
Ionic
Protons
Neutrons
Electrons
Protons= p+ / +1 / Nucleus
Neutrons = no / 0 / Nucleus
Electrons = e- / -1 / Electron Cloud
1 mole = ___________ particles
1 mole = ___________ grams
6.022 x 1023 particles
Molar Mass
When Aluminum becomes an ion...
Will it gain or lose e-?
How many e-?
What will the charge become?
Lose
3 electrons
+3 charge
How many sig figs do the following numbers have?
0.002
1.020
3.458
500
300.000
1
4
4
1
6
What is the difference between a cation and an anion
Cations = positive charged ion - original atom lost electrons
Anion = negative charged ion - original atom gained electron
Which subatomic particle is unique to all elements?
Protons
Identify the following reactions as S, D, SR, DR, C
Fe + S --> FeS
FeS + 2HCl --> H2S + FeCl2
C5H12 + 8O2 --> 5CO2 + 6H2O
2Na + 2H2O --> 2NaOH + H2
CaCO3 --> CaO + CO2
S
DR
C
SR
D
What orbital sublevel corresponds with Alkaline Earth Metals?
What orbital sublevel corresponds with Halogens?
S
P
Convert the following to scientific notation
5700
14,000,000
0.000675
5.7 x 103
1.4 x 107
6.75 x 10-4
What groups get roman numerals? (Give numbers)
What is the name of this section?
What are the exceptions within this section? (i.e. Who doesn't get roman numerals)
Which other two elements get roman numerals that are not part of this group?
Groups 3-12
Transition Metals
Zn , Ag
Pb, Sn
Answer the following questions for Calcium:
# Valence e-
Common charge
Group #
Period #
Number of electrons in inner energy levels
# of Protons
2
+2
Group 2
Period 4
18 Electrons
20 Protons
Count the number of each element:
4 (NH4)3PO4
N =
H =
P =
O =
N = 12 H = 48 P = 4 O = 16
Elements that are most reactive have a valence number that is either _____ or _____
1 or 7
Identify the following examples as: Element, Compound, Homogeneous Mixture, or Heterogeneous Mixture:
Sodium (Na)
Salt Water (Salt has completely dissolved)
Cookies and Cream Ice Cream
Hydrogen Peroxide (H2O2)
Element
Homogeneous Mixture
Heterogeneous Mixture
Compound
Write formulas for the following:
Ammonium bisulfate
Copper (II) chloride
Dihydrogen monoxide
Beryllium iodide
Sulfur hexafluoride
NH4HSO4
CuCl2
H2O
Bel2
SF6
What is the name of the group each element below belongs to:
Lithium
Iodine
Iron
Strontium
Argon
Alkali Metals
Halogens
Transition Metals
Alkaline Earth Metals
Noble Gas
Balance the following reactions:
___ H2O2 --> ___ O2 + ___ H2O
___ KMnO4 --> ___ K2O + ___ MnO + ___O2
2 H2O2 --> O2 + 2 H2O
4 KMnO4 --> 2 K2O + 4 MnO + 5 O2
Using the electronegativity chart, what type of bond will form and what kind of notation will you use?:
Nitrogen and Fluorine
Phosphorus and Sulfur
Lithium and Chlorine
Polar Covalent (Notation = partial charges)
Non-Polar Covalent (Notation = No Notation)
Ionic (Notation = Actual Ion charges)
Identify the following as a Physical Change or Chemical Change:
~Cracking Ice
~Baking cookies
~ Dissolving salt in water
~ Boiling Water
~ Metal reacting with an acid
~Setting of fireworks
Physical
Chemical
Physical
Physical
Chemical
Chemical
Name the following compounds:
CH4
Pb(SO4)2
Al(NO2)3
B5F9
N2O5
Carbon Tetrahydride
Lead IV sulfate
Aluminum nitrite
Pentaboron nonafluoride
Dinitrogen pentoxide
What is the definition and pattern for the following trends?
Atomic Radius
Ionization Energy
Electronegativity
Atomic Radius: distance from the center of the atom to the outermost energy level. Radius increases as you go down a group and decreases as you go across a period.
Ionization Energy: amount of energy to remove an electron. IE decreases as you go down in a group and increases as you go across a period.
Electronegativity: ability to attract electrons when bonded. EN decreases as you go down in a group and increases as you go across a period with the exception of the noble gas group, which don't bond.
Predict the following products and balance:
H2O --->
C3H8 + O2 --->
2 H2O ---> 2 H2 + O2
C3H8 + 5 O2 ---> 3 CO2 + 4 H2O
Draw diagrams for the following elements when bonded:
Aluminum and Bromine
CO2
Whiteboard work.