Download Chemistry Sample Questions

8th Physical Sciences – Sample Questions
Name ______________________________ Period_________
1) Describe in detail why atoms form covalent bonds. What is the
driving force behind atoms binding with other atoms? Describe
why noble gasses do not bind with other atoms.
Response:
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2) Consider the element Sodium:
a) Abbreviation _________________
(2 points)
b) Atomic Number _________________ (2 points)
c) Atomic Weight___________________ (2 points)
d) Number of Electrons _________________ (2 points)
e) Using the abbreviation, show an ion of Sodium:
______________ (2 points)
f) Number of Protons _________________ (2 points)
g) Number of Neutrons ________________ (2 points)
h) Name one property of Sodium. (2 points)
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i) Draw a Bohr model of Sodium (4 points)
j) How many directions does Sodium Bond? _______________
(2 points)
k) What kind of a bond does Sodium make with other atoms?
__________________________________________ (2 points)
3) The density of mineral oil is .85 g/ml. The density of black
ebony wood is 1.3 g/ml. The density of cooking oil is .926 g/ml.
When these items are put into a beaker of water and allowed to
settle, what would you expect to see? Draw a picture below.
Response:
4) Water (H2O) is made of two gases, hydrogen and oxygen.
Scientists want to send humans to the planet Mars, but humans
need oxygen and water to survive. If Mars was found to contain
underground deposits of ice, would it be possible for man to
survive and why?
Response: