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- Periodic table (7298 bytes)
1: ...chemical element]]s. First created by [[Dmitri Mendeleev]], the elements are arranged by [[electron]] ...
3: ...s for displaying the chemical elements]] for more details or different perspectives.
6: ...in a group have similar configurations of their [[valence shell]] electrons, which gives them similar prope...
9: ... The IUPAC scheme was developed to replace both older Roman numeral systems as they confusingly used t...
15: ... (standard)|standard table]] (same as above) provides the basics. - Chemistry (12553 bytes)
3: ...thumb|200px|Chemistry Flask Clipart .Clipart provided by [http://classroomclipart.com Classroom Clip A...
9: Chemistry typically is divided into several major sub-disciplines. There are al...
11: ...the [[analysis]] of material samples to gain an understanding of their [[chemical composition]] and [[...
19: ...physical chemists. Important areas of study include [[chemical thermodynamics]], [[chemical kinetics]...
28: ...for naming [[chemical compound]]s. There are well-defined systems in place for naming chemical species... - Atom (12300 bytes)
1: {| border="1" cellspacing="0" align="right" cellpadding="2...
7: | align="center" | '''Helium atom model (not to scale)'''<br>Showing nucleus with two pr...
43: ...or example, technetium and californium have been identified in supernovae.
48: ...her types of chemical compounds. Molecules are made up of multiple atoms; For example, a molecule of ...
50: ...on quantum effects, such as in [[Bose-Einstein condensate]]. - Helium (36603 bytes)
2: {| width="250" border="1" cellpadding="2" cellspacing="0" align="right...
4: {| align="center" border="0"
26: | [[Density]]
35: | 0.95 [[Kelvin|K]] (-272.2 °[[Celsius|C]])
38: | 4.22 [[Kelvin|K]] (-268.93 °[[Celsius|C]]) - Xenon (12457 bytes)
2: {| border="1" cellpadding="2" cellspacing="0" align="right...
4: {| align="center" border="0"
24: | [[Density]], [[Mohs hardness scale|Hardness]]
41: | [[van der Waals radius]]
50: | [[Oxidation state]]s ([[Oxide]]) - Chemical bond (3955 bytes)
1: ...thumb|200px|Chemistry Flask Clipart .Clipart provided by [http://classroomclipart.com Classroom Clip A...
3: ... discretely categorized, so a given bond could be defined by more than one of these terms.
13: ...how much the [[electron density]] is localized or delocalized among the atoms of the substance.
15: ...y]] (based on [[quantum mechanics]]) to help us understand these molecules.
19: ...ear combination of atomic orbitals]] (LCAO) helps describe the MOs' structures and energies based on t... - Solar cell (27643 bytes)
1: ... consisting of a large-area [[p-n junction]] [[diode]], which, in the presence of [[sunlight]] is capa...
5: ...r_cell.png|thumb|250x|right|A '''solar cell''', made from a poly-crystalline silicon wafer]]
15: ...2662&RS=PN/2402662 US2402662], "''Light sensitive device''"). Sven Ason Berglund had a prior patent co...
19: ... electric power output to the light power input. Ideally, near the equator at noon on a clear day, the...
21: ...rial for solar cells (and all other semiconductor devices) is crystalline [[silicon]]. Crystalline sil...
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