Unit 6: Periodic Table and Bonding - Mark Rosengarten
Unit 6: Periodic Table and Bonding - Mark Rosengarten
Unit 6: Periodic Table and Bonding - Mark Rosengarten
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Student Name:___________________________________ Grades: _____, _____<br />
PT/30 Bond/20<br />
1) The <strong>Periodic</strong> <strong>Table</strong> Homework<br />
A) Development of the <strong>Periodic</strong> <strong>Table</strong><br />
1) Who developed the periodic table? In what year?<br />
____2) In what order are the elements on the periodic table arranged today?<br />
a) atomic number b) atomic mass c) number of neutrons d) r<strong>and</strong>omly<br />
____3) What is the significance of the periods?<br />
a) Number of valence e- b) Number of PEL’s<br />
c) Number of electrons d) Number of protons<br />
____4) What is the significance of the groups?<br />
a) Number of valence e- b) Number of PEL’s<br />
c) Number of electrons d) Number of protons<br />
5) Using the <strong>Periodic</strong> <strong>Table</strong>, determine the number of valence electrons in atoms of the following elements,<br />
<strong>and</strong> the Principal Energy Level in which they will be found:<br />
Element<br />
Li<br />
# Valence<br />
Electrons<br />
PEL Element # Valence<br />
Electrons<br />
Na<br />
PEL<br />
Mg<br />
Ca<br />
Al<br />
Ga<br />
Ge<br />
Sn<br />
N<br />
P<br />
Se<br />
Te<br />
Cl<br />
I<br />
Kr<br />
Rn<br />
B) Sizes of Atoms<br />
1) Define atomic radius.<br />
____2) According to Reference <strong>Table</strong> S, as the elements Na to Cl are considered from left to right, what<br />
happens to the atomic radius of the atoms?<br />
a) increases b) decreases c) remains the same<br />
____3) According to Reference <strong>Table</strong> S, as the elements in Group 2 are considered from top to bottom, what<br />
happens to atomic radius?<br />
a) increases b) decreases c) remains the same<br />
© 2011, <strong>Mark</strong> <strong>Rosengarten</strong> AE 16