Module: Periodic Table and Trends
DCI: PS1.A (B) The periodic table orders elements horizontally by
the number of protons in the atom’s nucleus and places those with similar
chemical properties in columns. The repeating patterns of this table reflect
patterns of outer electron states.
PE: HS-PS1-1 Use the
periodic table as a model to predict the relative properties of elements based
on the patterns of electrons in the outermost energy level of atoms.
PE: HS-PS1-2 Construct and revise an explanation for the outcome of
a simple chemical reaction based on the outermost electron states of atoms,
trends in the periodic table, and knowledge of the patterns of chemical
properties.
[Clarification
Statement: Examples of properties that could be predicted from patterns could
include reactivity of metals, types of bonds formed, numbers of bonds formed,
and reactions with oxygen.] [Assessment Boundary: Assessment is limited to main
group elements. Assessment does not include quantitative understanding of
ionization energy beyond relative trends.]
[Clarification Statement: Examples of chemical
reactions could include the reaction of sodium and chlorine, of carbon and
oxygen, or of carbon and hydrogen.] [Assessment Boundary: Assessment is limited
to chemical reactions involving main group elements and combustion reactions.]
The basic content seems to be as follows.
What kids should KNOW
- The periodic table organizes elements by properties of the atoms.
- From left to right across a rows, the number of protons in the atom increases
- Elements in the same column share properties
- Repeating patterns in the PT reflect patterns in the outer electrons of elements.
What kids should BE ABLE TO DO
- Predict properties of elements based on relative position in the PT
- The properties kids should be able to predict are those relating to the electrons in the outermost shell.
- Be able to use the information from the PT to explain chemical reactions
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