Periodicity (HSC SSCE Chemistry): Flashcards
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Electronegativity definition
Electronegativity definition
How strongly an atom attracts bonding electrons
Higher electronegativity means
Higher electronegativity means
Stronger attraction of electrons in chemical bonds
Noble gases electronegativity value
Noble gases electronegativity value
(form virtually no compounds)
Electronegativity trend across a period (L to R)
Electronegativity trend across a period (L to R)
Increases
Electronegativity trend down a group
Electronegativity trend down a group
Decreases
Location of highest electronegativity (excl. noble gases)
Location of highest electronegativity (excl. noble gases)
Top-right of periodic table
High electronegativity elements form
High electronegativity elements form
Negative ions (anions)
Most electronegative elements
Most electronegative elements
F, Cl, O, Br, S (non-metals on right side)
Why electronegativity increases across a period
Why electronegativity increases across a period
Smaller atoms, increased nuclear charge, same outer shell
Why electronegativity decreases down a group
Why electronegativity decreases down a group
Larger atoms, more shielding from inner shells