Learning Scale: Unit 3 – Periodic Trends
Level 4
Congratulations on meeting proficiency (i.e. level 3) for Unit 3: Periodic Trends.
Now that you know your stuff, I’m providing you with the opportunity to
investigate and apply your understanding of these trends through the investigation
and research of three topics: ionic radius, oxides, & hydrogen.
I’d like you to engage these topics as if you were a “real” chemist. In other words,
take what you know, research the topics below, and prepare a report. I will assess
you achievement for level 4 based on the quality, quantity, and originality or your
report(s); example: each report would be worth ~ .33 towards achieving a 4.0 for
this unit. Please provide citations of the references you use in your research and, if
handwritten, write neatly so I can read it!
Ionic Radius
o Background: Ions are atoms that have lost or gained an electron. Atomic
radius can be summarized as the distance between the nucleus & it
valence electron(s).
o Goal: Propose and explanation for what occurs to the radius of an atom
when it becomes an ion. Does ionic radius differ from atomic radius? If so,
does this phenomena follow the same trend as atomic radius?
Electronegativity? Ionization energy?
Oxides
o Background: What are oxides? How do they form? What are the
similarities & differences of the oxides formed by metals and those formed
by non-metals (hint: what are the differences between acids and bases)?
o Goal: Propose an explanation(s) for how the periodic trends you have
learned in this unit might help you predict the properties and/or reactivity
of metal & non-metal oxides.
Hydrogen
o Background: While hydrogen may appear to be the simplest element on
the periodic table, its complexity proves otherwise. Its abundance in the
universe has fascinated scientists for generations. By now, you know the
periodic table: you know where to find the alkali metals or the halogens;
you know the elements that are diatomic and why the Noble Gases have
zero electronegativity, so…
o Goal: Use the periodic trends you have learned in this unit to propose why
hydrogen could be placed in a class by itself when reviewing its chemical
properties.
Learning Scale: Unit 3 – Periodic Trends
Level 4
Congratulations on meeting proficiency (i.e. level 3) for Unit 3: Periodic Trends.
Now that you know your stuff, I’m providing you with the opportunity to
investigate and apply your understanding of these trends through the investigation
and research of three topics: ionic radius, oxides, & hydrogen.
I’d like you to engage these topics as if you were a “real” chemist. In other words,
take what you know, research the topics below, and prepare a report. I will assess
you achievement for level 4 based on the quality, quantity, and originality or your
report(s); example: each report would be worth ~ .33 towards achieving a 4.0 for
this unit. Please provide citations of the references you use in your research and, if
handwritten, write neatly so I can read it!
Ionic Radius
o Background: Ions are atoms that have lost or gained an electron. Atomic
radius can be summarized as the distance between the nucleus & it
valence electron(s).
o Goal: Propose and explanation for what occurs to the radius of an atom
when it becomes an ion. Does ionic radius differ from atomic radius? If so,
does this phenomena follow the same trend as atomic radius?
Electronegativity? Ionization energy?
Oxides
o Background: What are oxides? How do they form? What are the
similarities & differences of the oxides formed by metals and those formed
by non-metals (hint: what are the differences between acids and bases)?
o Goal: Propose an explanation(s) for how the periodic trends you have
learned in this unit might help you predict the properties and/or reactivity
of metal & non-metal oxides.
Hydrogen
o Background: While hydrogen may appear to be the simplest element on
the periodic table, its complexity proves otherwise. Its abundance in the
universe has fascinated scientists for generations. By now, you know the
periodic table: you know where to find the alkali metals or the halogens;
you know the elements that are diatomic and why the Noble Gases have
zero electronegativity, so…
o Goal: Use the periodic trends you have learned in this unit to propose why
hydrogen could be placed in a class by itself when reviewing its chemical
properties.