Periodic Trends Inquiry ActivityRegents Chemistry

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Periodic Trends Inquiry Activity
Regents Chemistry
Name_________________________________
Visit each graph and determine whether the elements considered are illustrating group(s) or a period(s)
and determine what property is being evaluated. Evaluate the data to complete the following
statements.
Period trends
1) As elements within a period are considered in order of increasing atomic number,
electronegativity tends to _____________________.
2) As elements within a period are considered in order of increasing atomic number, first
ionization energy tends to _____________________.
3) As elements within a period are considered in order of increasing atomic number, atomic
radius tends to _____________________.
4) Do the trends observed within a period suggest that the valence electrons are being held
more tightly or less tightly by the nucleus as the atomic number increases? Explain your claim
citing specific evidence from the data.______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
5) Can you suggest a structural feature of the atoms that could be responsible for this periodic trend?_____________________________________________________________________________________
____________________________________________________________________________________
Group trends
6) As elements within a group are considered in order of increasing atomic number,
electronegativity tends to _____________________.
7) As elements within a group are considered in order of increasing atomic number, first
ionization energy tends to _____________________.
8) As elements within a group are considered in order of increasing atomic number, atomic
radius tends to _____________________.
9) Do the trends observed within a group suggest that the valence electrons are being held
more or less tightly by the nucleus as the atomic number increases? Explain your answer citing
specific evidence from the data.______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
10) Can you suggest a structural feature of the atoms that could be responsible for this group trend?_____________________________________________________________________________________
____________________________________________________________________________________
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