Contribute at least one vocabulary word and add one image to the definition. (Jezzett's page)

Jezzett : atomic size: atoms get larger as we go down a group on the periodic table and they get smaller as we go from left to right across a period.

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ionization energy- energy required to remove and electron of an element when in its gas state.

Metalloid- a metalloid is an element with properties intermediate between those of a metal and nonmetal. For example, silicon, is a metalloid because it is has a lustrous appearence, and it is malleable which are propertries of a metal. Yet it is also a semi conductor which means it conducts poorly unless under special conditions.
external image silicon.jpg

external image BE_vs_Z.jpg

Lanthanide/Actinide series-- the two rare earth element series at the bottom of the periodic table.

external image periodic-table-of-elements.jpeg&usg=AFQjCNE5_6c2CPzRVFn1Aa9EqLH2RXpK3g

Metal- an arrangement of positive ions surrounded by a cloud of delocalized electrons. They are one of the three groups of elements as distinguished by their ionization and bonding properties, along with metalloids and non-metals. Most metals appear lustrious and shiny, easily conduct electricity, and are opaque.

external image cobalt.jpg cobalt

Wavelength- The distance between two consecutive wave peaks

external image wavelength.gif


1. A quantum of electromagnetic radiation, usually considered as an elementary particle that is its own antiparticle. Regarded as a discrete particle having zero rest mass and no charge. Has a spin of one and an indefinitely long lifetime.

2. A unit of retinal illumination, equal to the amount of light that reaches the retina through 1 square millimeter of pupil area from a surface having a brightness of 1 candela per square meter.

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Orbital Box Diagram-Boxes grouped by sublevels with small arrows indicating the number of electrons. When drawing orbital boxes for an element,
the periodic table is read from left to right and is indicicated with sublevels and arrows. An orbital box can either contain 0, 1, or 2 arrows. When two arrows are in an orbital box, the first arrow is always upward and the second is downward. When there is one arrow then the arrow is upward.
For example
Lithium has 3 electrons so the orbital box diagram for Lithium would be
external image spinpair.gifexternal image spinup.gif
1s2 2s1
Brennan: valence electrons- The electrons in the outermost occupied principle quantum level of an atom.

external image spinpair.gifexternal image spinup.gif
1s2 2s1

Sublevels- subdivision of the principal energy level. (the number of sublevels increases with increasing n)

The link for the picture is provided below. I like the website I got this from, it explained what we are learning right now. I recommend looking at it.

"The number of sublevels that an energy level can contain is equal to the principle quantum number of that level. So, for example, the second energy level would have two sublevels, and the third energy level would have three sublevels."