Grade 9 IB Chemistry: Lewis Structure Essentials Flashcards

A set of vocabulary flashcards based on the Grade 9 IB Chemistry essentials for drawing and understanding Lewis structures.

Lewis Structure

A diagram that shows an atom's valence electrons using dots around the element symbol.

Valence Electrons

The electrons in the outermost shell of an atom.

Group 1 Elements

Main-group elements that have 1 valence electron.

Group 2 Elements

Main-group elements that have 2 valence electrons.

Group 13 Elements

Main-group elements that have 3 valence electrons.

Group 14 Elements

Main-group elements that have 4 valence electrons.

Group 15 Elements

Main-group elements that have 5 valence electrons.

Group 16 Elements

Main-group elements that have 6 valence electrons.

Group 17 Elements

Main-group elements that have 7 valence electrons.

Group 18 Elements

Main-group elements that have 8 valence electrons.

Octet Rule

The rule stating that most atoms tend to become more stable with 8 electrons in their outer shell.

Single Bond

A bond represented by a line between two atoms showing 1 shared pair of electrons.

Double Bond

A bond represented by two lines between atoms showing 2 shared pairs of electrons.

Triple Bond

A bond represented by three lines between atoms showing 3 shared pairs of electrons.

Lone Pair

A pair of electrons that is not being shared in a bond and remains associated with one atom.

Bonding Electrons

Electrons that are shared between atoms.

Duet

The electron target of 2 electrons that hydrogen aims for because its first shell can hold only 2 electrons.

Quick Memory Chain

The order of concept progression: Element -> group -> valence electrons -> number of dots -> octet rule -> bonding/lone pairs.