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Scientific Method, Elements, Atoms and Periodic Table Review
Skim through the following pages in our physical science book and answer the Section Review Questions
on the last page of each section as noted:
Scientific Method p. 11-19 (1-3)
1. List and describe the steps of the scientific method
2. Explain the importance of running both and experimental setup and a control setup
3. One morning you wake up and discover that your radio no longer works. How might you apply
the steps of the scientific method to determine the cause of the problem?
Elements p. 96-99 (1-3)
1. What is a pure substance?
2. What is an atom? How do atoms of the same element compare? Of different elements?
3. Write the chemical symbols for oxygen, nitrogen, lead, sulfur, sodium and helium.
Atoms p. 120-127 (1-4)
1. Classify the three main subatomic particles according to location, charge and mass.
2. Why does the nucleus account for 99.9% of the mass of an atom?
3. Define atomic number, isotope, atomic mass, mass number
4. Describe the arrangement of electron in an atom. Why is electron arrangement so important?
Period table
p. 135-140 (1-4)
1. Describe Mendeleev’s periodic table. What are some properties he used to order the
elements?
2. What does the word periodic mean?
3. How did Mendeleev predict the existence of undiscovered elements?
4. According to the modern periodic law, what determines the order of the elements?
p. 140-149 (1-4)
1. What important information is given in each square of the periodic table?
2. What are the horizontal rows in the periodic table called? What are the vertical rows
called?
3. What are some of the physical and chemical properties of metals? Of non-metals?
4. What is a metalloid?
p. 150-158 (1-5)
1. What is the key to the placement of an element in the periodic table?
2. Which two families contain the most active metals?
3. To which family do the most active non-metals belong?
4. Why are the elements in Family 18 called inert gasses?
5. How can the arrangements of elements in the periodic table be used to predict how
they will react with other elements to form compounds?
p. 159-161 (1-4)
1. What properties are periodic in nature?
2. What is the pattern in valences as you move from left to right across a period?
3. How does the atomic size change across a period?
4. 4. A scientist claims that she has discovered a new element that should be inserted
between nitrogen and oxygen in the periodic table. Why is it most likely that this
scientist has made a mistake? Hint: How does the number of electrons change as you
move from left to right across a period?