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# 03.03 Periodic trends

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## Scar Chirino

on 23 April 2014

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#### Transcript of 03.03 Periodic trends

Part 1: Going across
Part 2: Going Down
Part 3 Analysis and Conclusion
The end
1) Refer to the graph you created in part 1 of this assignment. Describe the general trend or patterns that you observed in the atomic radius as you go across the periodic table. (2 Points)
It seems that when the atomic radius is larger when the atomic number is smaller. This is because the decrease of the pull the protons give the electrons. Meaning a smaller number.

2) In Part 2 of this assignment, you graphed the atomic radius of the some elements from group 14 on this periodic table. What is the general trend for atomic radius going down that group? (2 points)
Once I looked at the graph I believe Tin has a radius of 155

5) Tin's actual atomic radius is 140 pm. Use the math equation below to determine the percent error of your estimated value. (2 points)
After solving out the equation for a percent error I got a chance of 7% error.

6) The atomic radius you estimated from your graph is most likely not exactly the same as the true atomic radius of tin. There is a small percent error. What do you think caused this error? (2 points)
I think what brought on this error was 4 jumping straight into 6. And how different the properties of the atom where. Because of the different electron shells this affects the electron cloud and it may vary.
When the atomic number in the same collum is bigger then the atomic radius is just as large. This is because the electrons in the inner shell are shielding more for the outter electrons to spread out.

3) What element in period 5 of the periodic table is a member of group 14? (1 point)
Tin is in both period 5 and group 14

4) The word interpolate means to use a given line graph to find unknown points between the plotted points of the graph. Use your line graph from part 2 to interpole, or estimate, atomic radius of Tin (Sn.) (1 point)
03.03 Periodic trends
By Scarlett Chirino
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