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Chemistry Exam 1

Last updated 12 months ago

18 questions

7

Match the following symbols with their name or description

Draggable item		Corresponding Item
O		the fuel for fusion reactions in the Sun and fusion bombs
F		Boron
N		the core element in diamonds, graphite, DNA, proteins, and carbohydrates
S		The most abundant element in our atmosphere
B		the common nonmetal that reacts with almost every other metal and nonmetal, making up a large part of the atmosphere, biosphere, hydrosphere, and the crust of the earth
C		Flourine
H		Sulfur

6

Match the following symbols with their name or description

Draggable item		Corresponding Item
Si		Helium
Ca		this metals density makes it useful for electric car batteries
Ne		Beryllium
Li		an inert Noble gas used in signs
He		its unusual ability to change its electrical conductivity makes it essential for microprocessors and solid state memory chips
Be		essential to bone and shell strength and muscle and nerve function

6

Match the following symbols with their name or description

Draggable item		Corresponding Item
K		Potassium
Na		A halogen that is useful for killing bacteria in drinking water and swimming pools
Fe		Iron
Hg		Silver
Ag		a metal that is liquid at room temperature and used in thermometers and other instruments
Cl		Sodium

6

Match the following

Draggable item		Corresponding Item
Argon		Element
Carbon Dioxide		Compound
Seawater		Mixture

5

Draggable item		Corresponding Item
Potassium		solution
Helium		the less reactive common gas in our atmosphere
Nitrogen		reactive metal
Gold		inert Nobel gas
Air		conductive nonreactive metal

2

Which of the following can be separated by fractional distillation

2

Helium is abundant in the universe but rare in our atmosphere because Earths gravity cannot keep it in the atmosphere (this is true of Hydrogen, is it also true of Helium?)

2

Helium is the product of Nuclear Fusion in the stars and bombs

1

Uranium is the fuel for Nuclear Fission in bombs and nuclear reactors

1

Uranium changes into Lead through a chemical reaction

2

Which of the following help kill bacteria

6

Match the following with what is produced when it reacts with Oxygen

Draggable item		Corresponding Item
Hydrogen		Orange Rust
Argon		Black Tarnish
Iron		Green Cupric Oxide
Silver		Water
Coal		Carbon Dioxide
Copper		Does not react with Oxygen

7

Match the following

Draggable item		Corresponding Item
surface tension		a chemical property
volume		the property that allows water striders to walk on water
density		the amount of matter in a substance
mass		the space a substance occupies
flammability		the mass of a substance divided by the space it occupies
color		the wavelength of visible light that is reflected or emitted from an object
temperature		the average kinetic energy of the particles in a substance

7

Match the following

Draggable item		Corresponding Item
melting point		a chemical property
boiling point		the temperature at which a substance freezes
reflectivity		the temperature at which a substance changes from a liquid state to a gaseous state
permeability		a measure of how much light or heat bounces back from an object
elasticity		the tendency of an object to bend under pressure and return to its original position when that pressure is removed
toxicity		the ability to allow something else to pass through it (e.g. water through soil, Oxygen through a membrane)
ductility		the ability to lengthen a substance like a wire without it breaking

7

Match the following

Draggable item		Corresponding Item
hardness		a chemical property
opacity		the way light interacts with the surface of a crystal, rock, or mineral
reactivity		the thickness, stickiness, or resistance to flow of a liquid
viscosity		how much pressure a substance can take without bending or breaking
luster		the ability of a substance to form a solution with another substance
strength		the ability of a substance to allow light to pass through it
solubility		the resistance of a solid to scratching

3

Which of the following is true of the graph below (there may be more than one correct answer)

10

Match each unit with what it measures

Draggable item		Corresponding Item
Pressure		g
Volume		mL
Mass		g/ml
Time		s
Density		N/m2 (or PSI in the British System) Force divided by a unit of area

20

Explain one or two of the labs we did, including your hypothesis, the materials, your procedure observations, and conclusions. Use as many as possible of the following words, using seven complete sentences:

density, graduated cylinder, beaker, scale, 9V battery, Silicon, Zinc, water, marker cap, isopropyl alcohol, electrode, Oxygen, Hydrogen, acid, base, pH indicator, electrolyte, test tube, alligator clips