10.1 Types of Chemical Bonds
When an atom loses an electron, it becomes a
positive ion
The chemical name for Na2S
sodium sulfide
substances listed on the left side of a chemical equation
what do you NEVER change when balancing an equation
subscript
A + B --> AB
synthesis
An ionic bond is the attraction between __
oppositely charged ions
CaCO3 represents a
chemical formula
The only sure evidence for a chemical reaction is
the production of one or more new substances
how you would know when an equation is balanced?
when each element has the same number of atoms on both sides of the equation
A chemical reaction that absorbs energy in the form of heat is described as
endothermic
chemical reaction
Ions that are made of more than one atom are examples of
polyatomic ions
(aq) means..
aqueous
Balance this equation
NaBr + Cl2 ----> NaCl + Br2
2 NaBr + Cl2 ---> 2NaCl + Br2
A + BC --> AB + C
single displacement
The electrons involved in bonding atoms
valence electrons
What does the "2" in MgBr2 tell you?
There are two Bromide ions for every one Magnesium ion
(l) means..
liquid
Balance this equation
___ AgN3 → ___ N2 + ___ Ag
2 AgN3 --> 3 N2 + 2Ag
reaction that results in a precipitate, water or gas when a positive ion of one compound swaps with another positive ion of another compound.
double displacement
A covalent bond in which electrons are shared unequally is
polar
A shorter, easier way to show chemical reactions, using symbols instead of words, is called a ____
chemical equation
The principle of ____________________states that during a chemical reaction, matter is not created or destroyed.
law of conservation of mass
Balance this equation
___ H3PO4 + ___ KOH → ___ K3PO4 + ___ H2O
3 KOH + H3PO4 → K3PO4 + 3 H2O
the difference between a catalyst and an inhibitor
a catalyst speeds up the reaction while an inhibitor stops or slows down the reaction