Card Set Information
compounds and molecules
what is a compound made of?
2 or more elements that are chemically combined
forces that hold atoms or ions together in a compound
the way a compound's atoms are bonded to make the compound
model with atoms represented by balls and bonds represented by sticks
the distance between the nuclei of 2 bonded atoms
angle formed by 2 bonds to the same atom
model that shows the relative sizes of atoms in a compound, but not bond lengths
can bonds bend, stretch, and rotate without breaking?
yes - but they hold atoms together tightly
what determines the properties of a compound?
chemical structure of the compound
table salt (sodium chloride) is found in the form of ___
regularly shaped crystals
strength of attractions of the molecules of gases
attraction to a hydrogen atom
when do atoms bond?
when their valence electrons interact
why do atoms join to form bonds?
so that each atom has a stable electron configuration
2 basic kinds of chemical bonding
attractive force between oppositely charged ions, which form when electrons are transferred from one atom to another
how are ionic bonds formed?
by the transfer of electrons
in what form are ionic bonds?
in the form of networks, not molecules
what do ionic compounds do when melted or dissolved in water?
bond formed when atoms share one or more pairs of electrons
covalent bonds usually form between what types of atoms?
can covalent bonds conduct electricity?
no - they are not charged
bonds in which electrons are shared equally
nonpolar covalent bonds
unequal sharing of electrons forms ___
polar covalent bond
to be able to carry
atoms in metals form ___
ion made of 2 or more atoms
how do polyatomic ions act in a compound?
as a single unit
what groups the atoms of a polyatomic ion in a chemical formula?
suffixes for polyatomic anions made of oxygen
-ite (fewer oxygen atoms)
-ate (more oxygen atoms)
what charge do ionic compounds must have?
total charge of zero
formula that tells the smallest whole-number ratio of atoms that are in a compound
chemical formula that shows the number and kinds of atoms i a molecule, but not the arrangement of atoms
covalently bonded compound that contains carbon, excluding carbonates and oxides
when a compound is made of only carbon and hydrogen atoms
hydrocarbons that have only single covalent bonds
molecule that is a long chain made of smaller molecules
smaller molecule that makes up a polymer
organic compounds that can be made by living things
class of molecules that includes sugars, starches and fiber
organic compound that is made of one or more chains of amino acids and is a principal component of all cells
compound of a class of simple organic compounds that contain a carboxyl group and an amino group, and that combine to form proteins
glucose that is not needed right away by the body is stored as ___
glycogen (a polymer of glucose)
polymer that stores genetic information
shape of DNA
molecules bonded to phosphate units corresponding to the "ladder's" sides
attached to each sugar molecule is one of four DNA monomers, which are?
what make up the "rungs" of the DNA "ladder"?
DNA monomer pairs