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Kevin Vuong and Ryan Hosseini - Per 1 (Periodic Table) (Element Groups…
Kevin Vuong and Ryan Hosseini - Per 1 (Periodic Table)
Periodic Trends
Electronegativity
Increases by going right and up on the periodic table (fluorine is the most electronegative)
Ionization energy
Depends on valence electron configuration
orbitals
smaller down group, depends on electron configuration for period
Electron affinity
energy change in an atom when electron is accepted
Atomic/ionic radius
smaller across period, bigger down group
Electron configuration
Valence electrons
orbitals
Hund's Rule
Pauli Exclusion Principle
s, p, d, f orbitals
effective nuclear charge
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electron shielding
Periodicity
Elements in same group share similar physical and chemical properties
Elements in same period have same highest principal energy level
Periodic Table Content
molar mass
atomic number
period/group #
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Element Groups
Group 1: Alkali metals
Group 2: Alkaline Earth metals
Groups 3-12: Transition metals
Group 18: Halogens
metals on left (Groups 1 -12, semi metals in middle (Groups 13-15), nonmetals on right (Groups 16-18)