Chemistry Semester 1 Review This is sample of what will be on the test.
Measurement:
1. Convert the following:
2.35 cm = ______m
5.7 L = ______mL
2.How many sig figs? 3400 ___ 0.0003___ 340.03____ .004300___
Measurement: Use the following data to answer questions 1-3
Mass of dish + cover = 20 g
Mass of dish, cover, and solid initial = 25 g
Mass of dish, cover, and solid after heating = 23 g
1. The mass of the solid is ______
2. The mass of the solid after heating is ______
3. The change in mass of solid is ______
Record the following measurements:
______
What are the following used for?
Beaker______
Erlenmeyer Flask______
Graduated Cylinder______
Test Tube ______
Lab Safety:
T/F If you break a beaker during a lab, sweep the glass into the trash can.
T/F It is OK to change the lab procedure given to you by your teacher if you think it will improve the experiment.
T/F If acid or chemicals are spilled on your hands, wash it off immediately with cool water.
T/F Reading the label for chemicals or solutions once is plenty.
T/F Always wear goggles when working with chemicals or Bunsen burners.
Observation and Inference
Identify each of the following statements as either observation (o) or inference (I)
_____ The car hit a tree.
_____ The front wheel has an oval shape.
_____ The man was speeding.
_____ The man is not hurt.
_____ The tree is taller than the car.
Accuracy and Precision
Use the terms accuracy and precise to describe the following data. The actual value is 10.
Name / Trial 1 / Trial 2 / Trial 3 / AverageFred / 15 / 5 / 10 / 10
Wilma / 4 / 25 / 20 / 16.3
Barney / 9.9 / 10.1 / 10 / 10
Betty / 13 / 12 / 13 / 12.7
Density
1. A 5 mL sample of water has a mass of 5 g. What is the density of water?
2. An object with a mass of 7.5 g raises the level of water in a graduated cylinder from 25.1 mL to 30.1 mL. What is the density of the object?
Classify Matter:
Matter or Not: Identify each piece of data as matter or not matter
______water
______radio wave
______phone
______magnetic field
______sound
Homogeneous or Heterogeneous-
Gasoline ______, Raisin Bran cereal______, Italian dressing______, Aluminum____ , C6H12O6 ______
Chemical property (cp) or physical property(pp)
Dissolves in water______, Burns in oxygen______, rusts______, is malleable_____
Freezes at room temp____, conducts electricity______
Periodic Table
Where on the periodic table do you find metals, nonmetals, and metalloids?
How many protons neutrons and electrons are in the element Al?
P= N= E=
How many protons neutrons and electrons are in the isotope 29 13 Al?
P= N= E=
How many valence electrons are in Iodine?
Draw the electron dot diagram for the element Selenium.
What is the electric charge of an atom that gains 2 electrons?
What is the electric charge of an atom that loses 3 electrons?
Describe how the size of the atom and ionization energy changes on the periodic table (down a group, across a period) “remember that the ionization energy is a measure of the force holding the a valance electron on the atom. Low ionization means it is easy to remove an electron and high ionization means it is very difficult to remove an electron,”
2-8-4
Nuclear Decay Alpha 42He Beta 0-1e Gamma 00γ
Find the missing part to the reaction:
1. 23892U ----> 23893Np + ______
2. 20986Rn ----> ______+ 42He
3. 23491Pa -----> 23491Pa + ______
4. ______-----> 24494Pu + 0-1e
5. 23893Np ----> 234 91Pa + ______
Compounds
Ionic bonds/compounds are formed by metals transferring electrons to ______
Covalent bonds /compounds are formed by non-metals sharing electrons with ______
Which element below would bond with Chlorine to form an ionic compound?
a. Sulfur b. Barium c. Oxygen d. Bromine
Which element below would bond with oxygen to form a covalent compound?
a. Sulfur b. Barium c. Potassium d. Sodium
Write the formula for:
sodium hydroxide magnesium sulfide aluminum sulfate
Nitrogen gas iron(III) selenide
disulfur trioxide dinitrogen hexafluoride
Balancing Equations
Type of reaction Balance Reaction
1. ______Al + ___ Pb(NO3)2 à ___ Al(NO3)3 + ___ Pb
2. ______C2H6 + ____ O2 à ____ CO2 + ____ H2O
3. ______PbO2 à ___ PbO + ___ O2
4. ______Al(NO3)3 + ___ H2SO4 à ___ Al2(SO4)3 + ___ HNO3
5. ______H2O2 à ____H2O + _____O2
6. ______Cl2 + ____ NaI à ____ NaCl + ____ I2
7. ______C6H14 + ____ O2 à ____ CO2 + ____ H2O
8. ______Ba(OH)2 + ____H2SO4 à ____H2O + ____BaSO4
Write the formulas and balance the following chemical equations:
1. magnesium + silver nitrate à magnesium nitrate + silver
2. calcium metal + water à calcium hydroxide + hydrogen gas
3. Aluminum Chloride + Lithium Oxide à Aluminum Oxide + Lithium Chloride