Elements
Where can all elements be found?
The Periodic Table of Elements!
Define Compound.
A thing that is composed of two or more separate elements.
What differs the types of compounds we use in this class?
The type of elements in the compound (metal, nonmetal, metalloid)
Define a mixture.
In chemistry, a mixture is a material made up of two or more different chemical substances which are not chemically bonded. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed.
In terms of charge and ions,
Metals are?
Nonmetals are?
(+) Cations!
(-) Anions!
What creates compounds?
individual elements!
What types of elements are in an ionic compound?
one Metal and one Nonmetal!
I2
Name the 2 types of mixtures.
Homogeneous and Heterogeneous!
List the names of the groups on the periodic table as well as their corresponding location.
1a- Alkali Metals
2a- Alkaline Earth Metals
7a- Halogens
8a- Noble Gasses
List 3 compounds you see in the world around you EVERYDAY
H2O
CO2
NaCl
What types are in a molecular/covalent compound?
one Nonmetal and one Nonmetal!
If something is a molecule it must have what?
two or more elements chemically bonded together!
Define a homogeneous mixture.
A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. All solutions would be considered homogeneous.
ex) sweet tea
Name the 7 Diatomic Elements
Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, Iodine!
Where can compounds be found?
Compounds can be found in the world around us, NOT on the periodic table!
What type of compound is H2O
COVALENT/MOLECULAR
List 5 molecules
...
Define a heterogeneous mixture
A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.
ex) chex mix
When are elements also molecules?
When the element is diatomic OR when it is in a compound!
What is the difference between compounds and mixtures?
Compounds are elements that are CHEMICALLY UNITED whereas Mixtures are elements simply MIXED TOGETHER
If you were dealing with an ionic compound what types of charges would you be dealing with?
Positive [metals (+)] and negative [nonmetals (-)]
Is this statement true or false?
All molecules are made up of elements but not all elements are molecules.
YES!!!! All mixtures can be seperated even if they are HOMOGENEOUS!