Element Names
H
Hydrogen
Chemistry
the study of matter, properties, behaviour, and the changes it undergoes.
How do you find the number for neutrons in an atom?
Take the atomic number and subtract it from the atomic mass
2Fe + 3Cl2 ---> 2FeCl3
Synthesis
PbO
Lead (II) Oxide
Mg
Magnesium
Matter
Anything that has a volume (takes up space) and mass (can be weighed)
what is the difference between an ion and a polyatomic ion
An ion is formed from a single atom, while a poly atomic ion is formed from a group of 2 or more atoms covalently bonded
2AgBr ---> 2Ag + Br2
Decomposition
Pb3(PO4)2
Na
Sodium
A Molecule
A group of 2 or more atoms bonded together by chemical bonds
Why does an ionic compound form?
Because atoms want to become stable (have a full outer shell of electrons) so they bond together (metal and non-metal) to gain and lose electrons thus becoming a stable, charged ion.
C2H4 + 3O2 ---> 2CO2 + 2H2O
Combustion
SO3
Sulfur trioxide
Fe
Iron
Covalent bond
a bond between two non-metals, where electrons are being shared.
Why and how are molecular compounds formed
When two non-metals bond together and share electrons, to have a "full outer shell"
AgNO3 + NaCl ---> AgCl + NaNO3
Double displacement
AgNO3
silver nitrate
Au
Gold
Family
The columns on a periodic table, elements that share similar chemical properties
conservation of mass
it states that mass can neither be created nor destroyed (also why we balance a chemical formula)
Cl2 + 2NaBr ---> 2NaCl + Br2
Single displacement