Name_______________________
Date_____________ Period_____
Earth Science – Chemistry Unit Review
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What are the three particles in an atom?
What is an element?
What are the two particles in the nucleus of the atom?
How do you find the number of neutrons in an atom?
The mass number of an element is the combination of what two particles?
Use your periodic table to fill the table below.
Who came up with the planetary model of the atom?
Who said atoms are indivisible and indestructible particles? His theory became one of the foundations
of modern chemistry.
9. What is the name of the element with atomic number 14?
10. What is the symbol of the element with atomic mass of 80?
Element
Name
Element
Symbol
Atomic
Number
Protons
Electrons
Neutrons
11
Atomic
Mass
Metal,
nonmetal,
metalloid
24
31
37
39
89
B
metalloid
11. Describe what a valence electron is.
12. How do you find the number of valence electrons in an atom? (And not by just looking at the column
number!)
13. Why is it important to know the number of valence electrons in an atom?
14. Draw a Bohr model for the element Phosphorous (Atomic number 15).
15. In a Lewis Dot Structure, the dots represent the _________________ _________________.
16. Draw Lewis Dot Structures for the following elements.
Ar
O
N
Se
17. Study the Lewis Dot Structures in the diagram below for lithium, carbon, fluorine, and neon. Why is
Neon considered a stable element?
18. What group is Neon in?
19. Would Carbon bond with Fluorine? Why?
20. Would Lithium bond with Fluorine? Why?
Li
C
F
Ne
Name_______________________
Date_____________ Period_____
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Is Sb (Antimony) a metal, non-metal, or metalloid?
Is Lithium (Li) a metal, non-metal, or metalloid?
What do elements in the same Family or Group (column) in the Periodic Table have in common?
What trend happens to elements as you go left to right across a Period (row) of the Periodic Table?
Patrick and SpongeBob love to blow bubbles! Patrick
found some Super Bubble Soap at Sail-Mart. The ads claim
that Super Bubble Soap will produce bubbles that are
twice as big as bubbles made with regular bubble soap.
Patrick and SpongeBob made up two samples of bubble
solution. One sample was made with 5 oz. of Super
Bubble Soap and 5 oz. of water, while the other was made
with the same amount of water and 5 oz. of regular
bubble soap. Patrick and SpongeBob used their favorite
bubble wands to blow 10 different bubbles and did their
best to measure the diameter of each one. The results are
shown in the chart
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What did the Super Bubble ads claim?
What is the independent variable?
What is the dependent variable?
Which type of bubble was the control?
What are three constants that should be in place for this experiment?
Calculate the average diameter for each bubble solution.
Super Bubble = ______ cm Regular Soap = ________ cm
31. What should their conclusion be?
32. Are the results reliable? Why or why not?
You have not had the following in class yet. Try to look up answers. But we will cover this information in
the next couple of days.
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What is a compound?
Is O2 and element or a compound?
What is a mixture?
What is the difference between a homogeneous mixture and a heterogeneous mixture?
Give five examples of a homogeneous mixture.
Give five examples of a heterogeneous mixture.
What are the characteristics of a metal?
What are the characteristics of a non-metal?
What are the characteristics of a metalloid?
Give an element that has similar characteristics to Bromine (Br).
Give an element that has similar characteristics to Nickle (Ni).
Describe the difference between a physical change and a chemical change.