Chemical Reactions Flashcards
1
Q
valence electrons determines3
A
- how reactive element is
- hat elements it will react with
- either lose or gain to form bonds
2
Q
lewis structure
A
shows only valence electrons
3
Q
chemical bond2
A
- force of attraction that holds 2 atoms together
- held together by negative and positive charges
4
Q
ion
A
-atom that has electric charge
5
Q
cation2
A
- positive
- loses electron
6
Q
anion2
A
- negative
- gains electron
7
Q
polyatomic ion2
A
- made of more than one atom
- can be positive or negative
8
Q
ionic bond6
A
- when atoms gain or lose valence electrons
- opposites attract, + and - hold it together
- occur between metals (left) and nonmetals (right)
- intend to attain a gull outer shell (2 or 8)
- atoms with 1-4 v.e. will lose
- atoms with 4-7 v.e. will gain
9
Q
oxidation number3
A
- the electric charge an atom has after it gains/loses electrons
- charges balance each other (should equal 0)
- little - or + in top after chemical symbol
10
Q
subscripts2
A
- ratio of elements in compound
- little number in bottom after chemical symbol
11
Q
coefficients2
A
- amount of a compound present
- big number before chemical symbol
12
Q
covalent bond4
A
- when 2 atoms share electrons
- formed between atoms of nonmetals
- share electrons to get a full outer shell
- number of bonds on atom can form equals number of electrons needed to make 8
13
Q
double bond
A
atoms share 2 pairs of electrons
14
Q
triple bond
A
atoms share 3 pairs of electrons
15
Q
molecular compound3
A
- composed of covalent bonds
- low melting points
- do not conduct electricity