Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
29 Cards in this Set
- Front
- Back
|
What can only be found as a single atom of the element |
noble gas |
|
|
what are salts characterized as having |
made up of more than one element are ionic as a result they have high melting points |
|
|
what do gases and liquids do at room temperature |
share their electrons in covalent bonds |
|
|
what are molecules |
covalently bonded compounds |
|
|
what are diatomic molecules |
commonly found molecules made up os 2 atoms |
|
|
how are compounds different than ionic compounds |
have lower melting and boiling points most are made up of 2 or more nonmetals as opposed to ionic compounds which are made up of a metal and a nonmetal |
|
|
what is the molecular formula |
the chemical formula of a molecular compound |
|
|
what does a molecular formula do |
show exactly how many atoms are present in the molecule |
|
|
what happens to the subscript if there is only one atom in a molecular formula |
its eliminated |
|
|
what sis a structural formula |
shows how the elements are laid out with respect to one another |
|
|
what is electron sharing |
occurs so that atoms from the electron configuration of nobel gases |
|
|
what is a single covalent bond |
2 atoms held together by a single pair of electrons |
|
|
how is the electron dot structure represented when its a single bond |
shared pair of electrons with 2 dots |
|
|
what does a structural formula use to represent the covalently bonded atoms |
with dashes |
|
|
what are present in diatomic molecules |
halogens |
|
|
what is an unshared pair of electrons |
a pair of valance electrons that isn't shared |
|
|
how does carbon form 4 covalent bonds |
by promoting one of the 2s electrons to the open 2p orbital |
|
|
what is a double covalent bond |
shares 2 pairs |
|
|
what is a triple covalent bond |
shares 3 electrons |
|
|
what is oxygens double bond |
O::O |
|
|
what is notions triple bond |
:N: : : N: |
|
|
what do molecules use when unshared electrons contribute to double or triple bonds |
coordinate covalent bond |
|
|
what kind of ion uses coordination covalent bonds |
polyatomic ions |
|
|
What happens when heat is given off in the reactant |
it can be assumed that the products are more stable than the reactants |
|
|
what is the bond dissociation energy |
the energy necessary to break the bond between 2 covalent bonds |
|
|
when can the octet rule not be satisfies |
if the total # of valance electrons is an odd #, or there are fewer or more than a complete octet |
|
|
what is a resonance |
some molecules that have 2 possible electron configurations |
|
|
what is an example of a resonance |
: O : O : : O <-> O : : O : O : |
|
|
what is a resonance structure |
1 bond is different than the other bond, but they are actually the same |
