Test 3 Trimester 1 Flashcards
Chemical reactions are ____________ (place)
Everywhere
How do you know when a chemical reaction takes place
Color change, gas formation, oder, temperare change, change in acidity, and precipitate formation
In a chemical reaction, matter is not
Created or destroyed
These represent chemical reactions
Chemical equations
when all substances in a compound are
combined with oxygen, which then produces carbon dioxide and water.
is commonly called burning. It is an exothermic reaction, which
means heat is produced. An example of a reaction is as follows:
CxHy + O2 –> CO2 + H2O
Combustion
when there is a combination of two or more
substances and a new compound is made. An example of a reaction is as
A + B –> AB
Synthesis
the opposite of synthesis. It is when a
compound is broken down into simpler substances. An example of
AB –> A + B
Decomposition
one element of a
compound is replaced with another element of a reacting compound. An example
A + BC –> AC + B
Single replacement
two elements of two
different compounds are replaced (or exchanged) to yield two new compounds.
An example of a reaction is as follows:
AB + XY –> AY + XB
Double replacement
Ionic bonds are formed between
Metals and non-metals
A transferring of electrons between atoms, as opposed to sharing those electrons, leads to
Ionic bonding
Molecules that have formed from ionic bonds tend to have ______ melting and boiling points, and a __________conductivity for electricity than those formed from covalent bonds.
Higher
can be used to determine whether a bond is polar covalent, nonpolar covalent, or ionic.
Electronegativity
refer to those bonds between atoms that are equally sharing electrons.
Polar covalent
Uneven bonding
Polar
