CHEM FINAL WCU COMPREHENSIVE
ASSESSMENT WITH QUESTIONS AND
ANSWERS
A change in a substance that does not change its identity
Ex: ripping a piece of paper - answer ✔✔-Physical Change
A change in matter that produces one or more new substances
Ex: rusting - answer ✔✔-chemical change
same number of protons - answer ✔✔-Atomic number
metal is the majority - answer ✔✔-Metal v nonmetal periodic table
number of valance electrons are the # of dots - answer ✔✔-Lewis structure
States that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons -
answer ✔✔-octet rule
*Remove or add electrons
*Never add or remove protons-this changes the identity of the atom.
*Add one electron for each negative charge, subtract one electron for each positive charge. - answer
✔✔-Forming ions
find the charges of each chemical and criss cross them - answer ✔✔-compund formulas
An ionic compound whose aqueous (water) solution conducts an electric current - answer ✔✔-
Electrolyte
ASSESSMENT WITH QUESTIONS AND
ANSWERS
A change in a substance that does not change its identity
Ex: ripping a piece of paper - answer ✔✔-Physical Change
A change in matter that produces one or more new substances
Ex: rusting - answer ✔✔-chemical change
same number of protons - answer ✔✔-Atomic number
metal is the majority - answer ✔✔-Metal v nonmetal periodic table
number of valance electrons are the # of dots - answer ✔✔-Lewis structure
States that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons -
answer ✔✔-octet rule
*Remove or add electrons
*Never add or remove protons-this changes the identity of the atom.
*Add one electron for each negative charge, subtract one electron for each positive charge. - answer
✔✔-Forming ions
find the charges of each chemical and criss cross them - answer ✔✔-compund formulas
An ionic compound whose aqueous (water) solution conducts an electric current - answer ✔✔-
Electrolyte
