Chapter 4 Flashcards
— matter that consists of two or more types of atoms chemically combined in definite proportions
Compound
— smallest unit of a compound that retains the chemical properties of that compound
Molecule
— elements exist as molecules
Molecular elements
— different forms that elements can exist in
Allotropes
— pure substances that can be decomposed into 2 or more pure substances
Molecular Compounds
— formula composed of # & type of each atom
Molecular formula
Chemical Formula
Structural Formula
— anions & cations attracted to each other by electrostatic forces
Ionic Compounds
— states force of attraction = K((n+e^-)(n-e^-))/d^2
*K = constant
*n+ = # of charges of cation
*n- = # of charges of anion
*e- = electrons charge
*d = distance between cation & anion
Coulomb’s law
— tend to form cations & ionic compounds
Metals
— tend to form anions
Nonmetals
— difficult to determine
Metalloids
The farther apart two elements are in a periodic table, the _______likely they are to form ionic compounds?
More
— nonmetal compounds
—
Molecules
— smallest unit of molecular compounds
Molecule
— normally solid; are infinite 3-D lattices
Ionic compounds
Properties of ionic solids
— do not conduct electricity as solids
— often dissolve in water
— generate ions
— polyatomic anions
Oxoanions
— prefix name for oxoanion with largest # of ions
Per—ate
— postfix name for oxoanion with larger # of ions
Ate
— postfix name for oxoanion with smaller # of ions
Ite