8.4.2 Physical Science; Atomic Knowledge

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8.4.2 Practice: Atomic Knowledge

Practice Assignment
Physical Science (S1744040)

Nestor Cruz
Points possible: 50

Date:12/18/12

Answer the following questions thoughtfully and thoroughly.
Atomic Structure
1. Name something that is not matter. Why is it not matter? (3 points)

Energy, it doesnt consist of atoms & molecules



2. How do homogeneous mixtures differ from heterogeneous mixtures? Where does the compound table salt (NaCl) fit into this description? (4 points)

Homo- uniform composition and properties throughout and known as solutions
ex; sugar/salt dissolved in water
Hetero- accent uniform in composition and properties throughout
ex; granite contains quartz

3. Are atoms positive, negative, or neutral in charge? Explain. (3 points)

neutral- they have the same number of electrons & protons


4. How does a molecule differ from an atom? (4 points)

a molecule is a bunch of atoms combined


5. If an element's atomic mass and atomic number are known, what else can be determined? Give an example to demonstrate your understanding. (4 points)

number of protons, electrons, neutrons will be known so will its position on the table.


Periodic Table
6. What are the rows on the periodic table called? What are the columns called? What do you know about elements in the same group? (3 points)

periods, groups, same number of valence electrons


7. Name two elements that have similar properties. How can you tell using the periodic table? (3 points)

Titanium & Zircon are in the same group.


8. What are the chemical families on the periodic table? (4 points)

Alkali metals
Alkaline earth metals
Inner transition elements
Transition elements
Other metals
Other nonmetals
Halogens
Noble gases


Periodic Trends
9. For main-group elements, using the older numbering system, the group number on the periodic table corresponds to which characteristic of the elements of that group? (3 points)


Alkali, Alkaline Earth, Boron, Carbon, Nitrogen, Oxygen, Halogens, Nobles gases, Transitions





10. Which is more attracted to the nucleus: an electron in the outermost shell of an atom, or an electron in the innermost shell? Why? (4 points)


Innermost, because electromagnetic force gets stronger the closer you get.





11. Which has more electron shells: oxygen or sulfur? How do you know? (3 points)


Oxygen in period 2
Sulfur is in period 3





12. Does electronegativity increase or decrease as you move left to right across a period on the periodic table? What about down a group? Why? (4 points)




Increase, right
Down a group, decrease



13. Which has lower ionization energy: an atom with a small radius, or an atom with a large radius? Why? (4 points)


Large, nucleus has less pull in a larger radius.





14. Give an example of an atom that will give up its outermost electron easily. Explain why you chose this atom. (4 points)




Hydrogen, has weak electronegative




Copyright © 2012 Apex Learning Inc. (See Terms of Use at www.apexvs.com/TermsOfUse)

[Williams, Sue]

35 out of 50

On Tue, Dec 18, 2012 at 1:06 PM, <ndan...@gmail.com> wrote:

8.4.2 Practice: Atomic Knowledge

Practice Assignment
Physical Science (S1744040)

Nestor Cruz
Points possible: 50

Date:12/18/12

Answer the following questions thoughtfully and thoroughly.
Atomic Structure
1. Name something that is not matter. Why is it not matter? (3 points)

Energy, it doesnt consist of atoms & molecules

    3 points

2. How do homogeneous mixtures differ from heterogeneous mixtures? Where does the compound table salt (NaCl) fit into this description? (4 points)

Homo- uniform composition and properties throughout and known as solutions
ex; sugar/salt dissolved in water
Hetero- accent uniform in composition and properties throughout
ex; granite contains quartz

      2 points

3. Are atoms positive, negative, or neutral in charge? Explain. (3 points)

neutral- they have the same number of electrons & protons

     3 points

4. How does a molecule differ from an atom? (4 points)

a molecule is a bunch of atoms combined

     2 points

5. If an element's atomic mass and atomic number are known, what else can be determined? Give an example to demonstrate your understanding. (4 points)

number of protons, electrons, neutrons will be known so will its position on the table.

       4 points

Periodic Table
6. What are the rows on the periodic table called? What are the columns called? What do you know about elements in the same group? (3 points)

periods, groups, same number of valence electrons

3  point

7. Name two elements that have similar properties. How can you tell using the periodic table? (3 points)

Titanium & Zircon are in the same group.

     1 point

8. What are the chemical families on the periodic table? (4 points)

Alkali metals
Alkaline earth metals
Inner transition elements
Transition elements
Other metals
Other nonmetals
Halogens
Noble gases

      4 points

Periodic Trends
9. For main-group elements, using the older numbering system, the group number on the periodic table corresponds to which characteristic of the elements of that group? (3 points)


Alkali, Alkaline Earth, Boron, Carbon, Nitrogen, Oxygen, Halogens, Nobles gases, Transitions

     0 points

10. Which is more attracted to the nucleus: an electron in the outermost shell of an atom, or an electron in the innermost shell? Why? (4 points)


Innermost, because electromagnetic force gets stronger the closer you get.

      4 points

11. Which has more electron shells: oxygen or sulfur? How do you know? (3 points)


Oxygen in period 2
Sulfur is in period 3

   3 points

12. Does electronegativity increase or decrease as you move left to right across a period on the periodic table? What about down a group? Why? (4 points)




Increase, right
Down a group, decrease

    4 points

13. Which has lower ionization energy: an atom with a small radius, or an atom with a large radius? Why? (4 points)


Large, nucleus has less pull in a larger radius.

     2 points

14. Give an example of an atom that will give up its outermost electron easily. Explain why you chose this atom. (4 points)




Hydrogen, has weak electronegative 

      2 points

Copyright © 2012 Apex Learning Inc. (See Terms of Use  at www.apexvs.com/TermsOfUse)

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