Download Chapter Test on 4, 5 2016-2017 _____1. You ar

Name ______________________________________________ Date ____________ Period ___
Chapter Test on 4, 5 2016-2017
_____1. You are about to open a container of soy milk but notice that there are instructions to “shake well before
serving.” The soy milk is most likely a
a. solution
c. colloid
b. pure substance
d. suspension
_____2. Filtering or straining can be used to separate mixtures based on
a. their boiling points.
c. their melting points.
b. their densities.
d. the size of their particles.
_____ 3. What method can be used to separate parts of a solution when the entire mixture can pass through a filter?
a. filtration
c. straining
b. distillation
d. screening
____ 4. The Greek philosopher Democritus invented what word for a tiny piece of matter that cannot be divided?
a. element
c. electron
b. atom
d. molecule
_____ 5. Which of the following most accurately represents John Dalton’s model of the atom?
a. a tiny, solid cloud
b. a hollow sphere with a dense nucleus
c. a tiny, solid sphere with a predictable mass for a given element
d. a sphere that is hollow throughout and empty
_____ 6. J.J. Thomson’s experiments provided evidence that an atom
a. is the smallest particle of matter.
c. has an overall negative charge.
b. contains negatively charged particles.
d. only has positive charge.
_____ 7. Rutherford’s gold foil experiment provided evidence for which of the following statements?
a. Negative and positive charges are spread evenly throughout an atom.
b. Alpha particles have a positive charge.
c. Gold is not as dense as previously thought.
d. There is a dense, positively charged nucleus in the center of an atom.
_____ 8. Which subatomic particle has a positive charge?
a. electron
c. neutron
b. betazoid
d. proton
_____ 9. Which statement about subatomic particles is completely true?
a. Protons, neutrons, and electrons all have the same mass.
b. Unlike protons or neutrons, electrons have no mass at all.
c. Neutrons have no charge and no mass.
d. An electron has far less mass than either a proton or neutron.
_____ 10. Which statement is true about oxygen-17 and oxygen-18?
a. They do not have the same number of protons.
b. Their atoms have identical mass.
c. They are isotopes of oxygen.
d. The have the same mass number.
_____ 11. How is the atomic mass of an element determined?
a. Count the number of protons and neutrons in an atom of the element.
b. Use the atomic mass of the most abundant isotope.
c. Take a weighted average of the masses of the isotopes present in nature.
d. Average the atomic masses of all its isotopes.
_____ 12. Which of the following is only a physical change?
a.
sawing a piece of wood in half
b.
burning a piece of wood
c.
rust forming on an iron fence
d.
a copper roof changing color from red to green
_____ 13. Which of the following is a chemical change?
A
ice melting
B
ice being carved
C
water boiling
D
water breaking down into hydrogen and oxygen
_____ 14. Who provided evidence for the existence of a nucleus in an atom?
A
John Dalton
C
Democritus
B
J.J. Thomson D
Ernest Rutherford
_____ 15. In Niels Bohr’s model of the atom, electrons move
A
like balls rolling down a hill.
C
like popcorn in a popcorn popper.
B
like planets orbiting the sun.
D
like beach balls on water waves.
16.
____________________ is a process that could be used to separate dissolved particles from the liquid in
a solution.
17.
Protons and ____________________ are found in the nucleus of an atom.
18.
Neutrons and ____________________ have almost the same mass.
19. Matter that consists of two or more substances mixed together but not chemically combined is called a
____________________
20. The substances that make up a mixture can be present in any _____________________
21. The substances in a mixture can be separated by simple ____________________means.
22. To separate sand from water, you can _______________________________________________________
23. To separate salt from water, you can ________________________________________________________
24. To separate iron particles from sand, you can _________________________________________________
25. In a solution, the part that does the dissolving is called the ___________________
26. In a solution, the part that gets dissolved is called the ________________________
27. A mixture where the parts will settle after a while is a ______________________
28. The atomic mass unit (amu) is the mass of one ______________________
29. A mixture of metals is called ____________________.
30. Bronze is a mixture of copper and ___________________
31. Brass is a mixture of copper and _________________
32 and 33.
What are the four forces involved in an atom? ________________, _________________,
________________________, _____________________
34. Describe the strong force.
35. Describe the electromagnetic force.
36. Two atoms must be the same element if they have the same number of ___________________.
37. What element has an atomic number of 13? ______________
38. How many protons are there in an atom of Radon? __________
39. When writing down the combinations of the elements that form a compound, such as AgNO3, this shortened
list of the elements is called a _______________________
_______________________.
40. How many atoms (not elements) are in a molecule of AgNO3 ? _______
41. When we write about the reaction that molecules experience, it looks like:
2H20 2H2 + O2
This is called a ___________________
before and after the reaction.
42 – 44 Fill in all missing information
Element
Atomic
Mass
Symbol
Number
Number
_____________________ and there are the same number of atoms
Number of
Protons
Number of
Neutrons
11
5B
Nb
38Sr
2+
41
54
89
Number of
Electrons