Chemical Bonding Flashcards
Outermost electrons
Valence electrons
attraction between atoms
chemical bonds
the theory that describes elementary aspects of chemical bonding
Lewis Theory
net transfer between atoms (connect electrostatically)
ionic bonds
shared electrons bond
covalent bonds
unequal sharing and large difference between electronegativity
polar bonds
symmetric arrangement of atoms and zero dipole movement
nonpolar bonds
all atoms are configured in eights
Octet rule
Exceptions to the Octet rule
Duet rule (He), incomplete octets (BF2), Odd-eletron species (NO), Expanded octets (PCl5)
What are odd electron species/ radicals?
involve atoms with unpaired valence electrons
What are expanded octets?
more than eight valence electrons
What do you use to represent the valence electrons of an atom?
Lewis Dot Symbols
What do you use to represent the valence electrons of a formula?
Lewis Structures
What are ionic compounds?
compounds made up of positive and negative ions held by an ionic bond
How do you write ionic formulas?
Criss cross method
What are molecular compounds?
Compounds made up of discrete molecules held by covalent bonds
Polarity of a molecular compound is affected by what?
Electronegativity difference and molecular geometry
Between molecular and empirical formulas, which is supposed to be in the smallest whole number ratio?
Empirical
Can two compounds have the same empirical formula?
yes
Ionic compounds are compounds between ____ and ____
metals and nonmetals
compounds between two nonmetals are called?
Molecular compounds
Indicators of an ionic compound
1) unmodified metal + nonmetal-ide
2) metal-our or -ic + nonmetal-ide
3) unmodified metal (roman numerals) + nonmetal-ide
Indicators of molecular compound
prefixes
What are ternary compounds?
composed of more than two elements
