Ionic Metal Nonmetal Metals lose valence electrons form

















- Slides: 17


Ionic: Metal + Nonmetal • Metals: lose valence electrons – form cation (+ ion) • Nonmetals: gain electrons – form anion (- ion)

IONIC BONDING • Involves the transfer of electrons • Electrons Lost by Cation = Electrons Gained by Anion

Metals are losers! • Na has the configuration 2 -8 -1 • Ne has the configuration 2 -8 • Na loses 1 electron → Na+1 – Na+1 configuration is 2 -8! (Ne) • What will take the valence electron from Na? ?

Na metal

Nonmetals are winners! • Cl has the configuration 2 -8 -7 • Ar has the configuration 2 -8 -8 • Cl gains 1 electron → Cl-1 – Cl-1 has the configuration 2 -8 -8! (Ar) • What will donate an electron to Cl ? ?

Cl 2 (g)

Electron is transferred from Na to Cl

Structure of Ionic Compounds • Ions are attracted to each other by strong electrostatic interactions (+/-) • Ions form a crystal lattice – regular 3 -D pattern or array – Ions are held in fixed positions (solid state) • Unit Cell = smallest repetitive unit in lattice


Na. Cl has its own unique properties lattice structure

The more Na and Cl 2, the larger the resulting Na. Cl crystal -just keep adding on to it

Different representations of a crystal lattice


Lewis Diagrams for Ionic Compounds Na. Cl's Lewis structure: • • • • -1 +1 [Na] [ • Cl • ] • • Remember: Lewis diagrams show valence electrons!

Predicting Ionic Compounds • What is the ionic compound formed from calcium and iodine? • Calcium - metal - 2 valence electrons - loses both electrons [Ca]+2 • Iodine - nonmetal - 7 valence electrons • • -1 - gains 1 electron [ • • I • • ] • • • How many iodine ions do you need to make a neutral compound? 2

Lewis Diagram of Calcium iodide Ca 2 -8 -8 -2 → Ca+2 2 -8 -8 -0 I 2 -8 -18 -18 -7 → I-1 2 -8 -18 -18 -8 ·· -1 +2 [Ca] [: I: ] ·· -1 +2 or [: I: ] [Ca] [: I: ] · ·· · Note: total charge adds up to zero - compounds are neutral
Do metals lose electrons
Think win-win examples
Win win win lose lose lose
Win win situacija
Metals lose electrons
Valence electrons in ga
Elements with 7 valence electrons
Whats an ionic bond
When a metal reacts with a nonmetal the metal will
How do chemists model the valence electrons of metal atoms?
How do chemists model the valence electrons of metal atoms?
In reactions to form ionic compounds metals generally
Physical properties of metals
Deirdre brennan
Example of metal elements
Is co a metal or nonmetal
Sucrose metal or nonmetal
Liquid elements at room temperature