2.7 Lewis Diagrams Flashcards
Define Valence electrons
electrons in the outermost unfilled s and p orbitals of an atom
The # of __ in an atom is equal to the # of boxes on the periodic table from the left edge up to and including the elements box (excluding d orbital electrons)
valence electrons
Why doesn’t neon react w/ other elements?
extremely stable w/ 8 valence electrons
Representative elements that have the same valence structure have the same __ and similar __
– combining capacity
– chemical properties
Define Electronegativity
ability of an atom to pull electrons toward itself
What happens when the electronegativities of 2 atoms are quite different from each other?
ionic bonding
Define Covalent bonds
When atoms share electrons; typically b/w nonmetals
How does the electronegativity in diatomic molecules affect their bonding?
are identical; electrons are shared equally
The __ of an element often indicates how many bonds it will form
combining capacity
Lone pair vs bonding pair
– electron that is paired up
– single electron needing to bond to make a full octet
Structural diagrams represent __ only
bonding electrons
Define ‘formula unit’
The simplest ratio of ions in an ionic crystal lattice
State the octet Rule and any exceptions
– All atoms want to become more stable by gaining a full valence shell of 8 electrons
– H and He are satisfied by only 2 electrons