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Chemistry

Knowing the bonds

TermDefinition
Compound When 1 or more atoms are bonded together
Molecule A compound that has covalent bonds
Formula Unit A compound that has ionic bonds
Ionic Bonds -There is a transfer of electrons -Metal + Nonmetal (ex: NaCl)
Covalent Bonds -Atoms share electrons -Two NONmetals (H20)
Chemical Formula Notation using symbols and numbers to represent the composition of a substance.
Molecular Formula Shows the number and kinds of atoms actually present
Empirical Formula Gives the simplest ratio between atoms.
Coefficients Used to show the presence of multiple compounds
Formula Unit Ionic, always REDUCE to empirical ex: Na2Cl2 --> NaCl
Diatomic Molecules elements that always exist as a molecule (the magic 7)
Size/Radius Atomic radius increases as you move from right to left through a period. -Nuclear charge increases which draws in the outer electrons
Shielding inner electrons block the nuclear charge toward the outer shell electrons.
Electronegativity The atoms's ability to pull an electron towards itself when bonded.
Ionization Energy The amount of energy required to pull an electron off.
Mono 1
Di 2
Tri 3
Tetra 4
Penta 5
Hexa 6
Hepta 7
Octa 8
Nona 9
Deca 10
Created by: annsonic