The standard information is present,
along with several unique additions. (a) The isotopes of elements are
described by providing the common number of neutrons (comprising 95%
of existing forms), (b) the common oxidation numbers are listed to show
group similarities and describe the variability of transition metal
values. (c) Electronegativity values are shown in order to determine
polarity in bonds. Two additional features in the same location note
(d) if the element is diatomic when in a pure state - the two balls
connected by a line (the line doubles for double bonding, such as oxygen)
- which helps students recall that detail when completing and balancing
equations. Alternatively, the location is used (e) to show if the elements
are radioactive.
The poster notes (f) melting and boiling points - handy to show periodic
trends and also the (g) date synthesized and (h) half-life values for
the longest isotopes. These are useful data for a teacher to have readily
available during a class. The items (a) (f) (g) and (h) are not included
on the notebook version.
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