### Atomic Radius & Periodic Table – Chemistry

The key terms of this chemistry chapter include Atomic Radius trend, Periodic Table, Atomic Number, Electrons, Elements, atomic radius of Tin (Sn), Chemistry Exam.

Part 1

Atomic Radius Trend Going Across The Periodic Table

Part 2

Atomic Radius Trend Going Down A Group

Analysis And Conclusion

Describe the general trend or patterns that you observed in the atomic radius as you go across the periodic table.

When the atomic radius is larger when the atomic number is smaller.

What is the general trend for atomic radius going down that group?

There was a recognizable trend for some of the elements in graph two, the atomic radius is bigger when the atomic number in the same column is also bigger.

What element in Period 5 of the periodic table is a member of Group 14?

Tin is in both period 5 and group 14.

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 interpolate, or estimate, atomic radius of Tin (Sn).

By estimating the atomic radius of Tin (Sn) it would come out to be an atomic radius of 150.

Tin’s actual atomic radius is 140 pm. Use the math equation below to determine the percent error of your estimated value.

After using the equation provided above my answer was slightly over 7% my estimated number.

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?

I don’t think this was precise because of my graph design possibly, it went from period number 4 to 6, which left a lot of room for error in estimation. The properties of atoms range differently, and their shells will differ and this will affect the electron cloud.

Homepage