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Chem Periodic Table

Periodic table quiz

TermDefinition
Mendeleev periodic table (past) originally organized elements based upon atomic mass
Mosley periodic table (modern) organized elements by # of protons (atomic #)
periods (horizontal rows) equal to the # of energy levels (shells)
groups (vertical columns) elements have the same # of valence electrons & results in similar chemical properties
reactivity of elements determined by # of valence electrons
stable octet the closer to a stable octet, the more reactive the element is
group 1 alkali metals, extremely reactive with water & most reactive metal is Francium
group 2 alkaline earth metals, fairly reactive in water
group 3-12 transition metals, least reactive metals
group 17 halogens, most reactive non-metal is fluorine
group 18 noble gases, non-reactive, stable octet & always mono-atomic
metals (left side of table) malleable, ductile, excellent conductors, shiny, loses electrons to form cations (+) & solid at STP
metalloids ( located on the black staircase ) semi-conductors, shiny but brittle
non-metals (right side of table ) poor conductors, brittle, dull and gain electrons to form anions (-)
Atomic radius size of the atom & located on Table S
(atomic radius ) across a period... decreases, because nuclei have greater nuclear/proton pull. (Use Table S)
(atomic radius) down a group... increases, because more # of energy shells (Use Table S)
Ionization Energy is.. the energy required to remove the most loosely bond electron.
Ionization Energy ___________ across a period because... increases, more nuclear pull
Ionization Energy __________ down a group because... decreases, more electron shells
Electron-negativity is... the measure of the attraction for electron bonds (Table S)
The most electron-negative is.. fluorine, the closer an atom is to it the higher the EN
Electron-negativity ________ across a period because.... increases, greater proton pull
Electron-negativity _______ down a group because... decreases, larger radius / less nuclear pull
Created by: ahayd20090
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