Download Shiny, Happy Pretest - Alex LeMay – Science

Please DO mark your answers on this test paper!!!
________________________
Matter, Atomic Structure and Model
Development
-the shiny, happy pretest!!!
I. Label each of the following as an…
A) element
B) compound
C) homogeneous mixture
or
D)heterogeneous mixture.
___1. Gold
___2. A Big Mac
___3. Water (H2O)
___4. Plain jello (no fruit)
___5. Jello with fruit
___6. Silicon dioxide (SiO2)
___7. calcium
II. Write the name of the person with what they did. Put the person’s letter(s) on the
scantron card that matches the correct statement below.
Plato and Aristotle
Democritus (460-370 BCE) and his teacher Leucippus
Antoine Lavoisier (1743-1794)
Joseph Proust (1754-1826)
John Dalton (1766-1844)
William Crookes (1832-1919)
J.J. Thomson (1856-1940)
Wilhelm Roentgen (1845-1923)
Henri Becquerel (1852-1908)
Ernest Rutherford (1871-1937)
Hans Geiger (1882-1945)
Ernest Marsden (1889-1970)
James Chadwick (1891-1972)
8. Concluded that in a reaction, nothing was created or destroyed - the Law of Conservation of
Mass. Had his head chopped off. _______________________
9. Discovered that there are some substances, like uranium, that give of radiation spontaneously
- no energy had to be applied.____________________________
10. Concluded that the elements in compounds always combined in definite amounts - the Law of
Definite Proportion (also called the Law of Definite Composition). Was burned out by Napoleon.
_______________________________
11. Discovered that a beam of electrons shot at an object caused another form of energy to be
emitted from the object. He called this energy x rays. Fingers fell off due to radiation exposure.
________________________________
12. Put together the Atomic Theory, established the Law of Multiple Proportions, and explained
the difference between a mixture and a compound. ______________________
13. Worked in Rutherford’s lab on the gold foil experiment, an undergraduate student who worked
with Geiger.__________________________
14. Worked in Rutherford’s lab on the gold foil experiment, a graduate student who suggested
that Rutherford should let Marsden get some lab experience. __________________________
15. Believed that the world was made of matter that could be divided infinitely. _____________
16. Figured out that radiation can be divided into alpha particles, beta particles and gamma rays
and that atoms were mostly space with a small, positively charged center by using his gold foil
experiment. ________________
17. Calculated the existence of a particle the same mass as a proton but with no charge - the
neutron. _____________________
18. First to get an stream of electrons to pass through a vacuum tube, establishing the existence
of cathode rays. _____________________
19. Is credited with discovering the electron, calculating the electron’s mass to charge ratio, and
creating the plum pudding or blueberry muffin model of the atom. ___________________
20. Said the universe was made of atomos, or small, indivisible particles. Thought these particles
were earth, air, fire, and water. __________________
III. Match the laws with their definition.
A. Law of Conservation of Mass
B. Law of Definite Proportion
C. Law of Multiple Proportions
_____21. Nature can put together carbon and oxygen in different ratios (CO or CO2) but it will
make different substance.
_____22. In a reaction, nothing is created or destroyed; the mass of the reactants before
the reaction is the same as the mass of the product after the reaction.
_____23. When nature chemically combines substances, they always combine with a set
amount of one substance and a set amount of the other. ( 2H + O - H2O)
IV. Models
Match the model with it’s description.
A. Rutherford Model
B. Bohr Model
C. Thomson Model
D. Dalton Model
E. Present Model
___24. Electrons travel in energy specific orbits around the nucleus.
___25. There is a positively charged nucleus in large mostly empty space; the electrons are
somewhere in that space.
___26. The atom was one solid ball.
___27. Electrons orbit in probability clouds
___28. The positively charged electron ball is studded with electrons, like blueberries in a muffin.
V. Atoms
Use the periodic table information below to answer the following questions.
30
30
ZN
Zn
Zinc
Zinc
65.39
65.39
Use these answers choices; you may use them more than once or not at all.
A) Zn-60
B) Zinc
C) 65. 39
D) 30
E) 85
AB) 35
BC) Zn-95
CD) Zn
DE) 35.39
EA) fish
___29. What is the atomic number?
___30. What is the atomic mass?
___31. How many protons would an atom of this element have?
___32. How many neutrons would an atom of this element likely have?
___33. How many electrons would an atom of this element have?
___34. If an atom of this element had 30 neutrons, what would the isotope be?
___35. What this element’s atomic symbol?
___36. Which particle carries a negative charge?
A) proton
B) neutron C) electron
___37. What is the mass of a neutron?
A) 1 amu
B) 1/1837 amu
C) 0 amu
D) 2 amu
E) .5 amu
___38. An atom could be accurately described as…
A) a mostly solid ball
B) mostly empty space
C) mostly larger than a cell
D) mostly getting its mass from the electrons
___39. Which particle attracts the electron?
A) proton
B) neutron
C) another electron
___40. Isotopes are atoms of the same element with different numbers of…
A) protons
B) energy levels
C) electrons
D) charges
E) neutrons
___41. One of the numbers in a periodic table square can be a number with a decimal. This
indicates the existence of…
A) ions
B) radioactive nuclei
C) isotopes
D) valence electrons
A little more review
___42. A property that indicates how a substance reacts with another substance is a
A) physical property
B) chemical property
___43. A change that does not change the chemical composition of the substance is a
A) physical change
B) chemical change.
___44. Matter is anything that has (mark all that apply)
A) matter
B) volume
C) energy
D) wavelengths
___45. A pure substance can be a(n) (mark all that apply)
A) element
B) compound
C) heterogeneous mixture
D) homogeneous mixture
Mark the properties or changes as
A) physical or
B) chemical
___46. A diamond that is blue
___47. A powder that dissolves in water
___48. A ring that is magnetic
___49. A rock heated until it becomes liquid
___50. A copper sculpture that turns green after being exposed to air
Radiation
51. Describe the composition of each form of radiation and the symbols for them
Alpha
Beta
Gamma
52. How is beta decay different from alpha decay?
52. Write the equation for the alpha decay of Rn-219.