Scientific Method
Dependent/Independent Variable
D - Depends on another variable, measured or tested
I - Variable you control or Intentionally change
Proton Charge/Placement
Positive, In the nucleus
Chemical Formula
written using the symbols for elements shown on the periodic table and subscripts
Ionic
Atoms lose or gain electrons and now have a charge
Graphing X/Y axis
Dependent Variable is on the Y
Independent Variable is on the X
Negative, In the Electron Cloud
Structural Formula
Uses The letters for the atoms that are connected by lines that represent chemical bonds—one, two, or three lines stand for single, double, or triple bonds
Covalent
atoms share outermost electrons to fill their outermost energy level
Observation/Inference
O - Info gathered by noticing, perceiving, or watching and is based on the 5 senses. (Has to be a fact)
I - Explanation about something using prior knowledge
Nutron Charge/Placement
Neutral/No charge, In the Nucleus
Molecular Formula
Tells us the number & kinds of elements present in a compound
Polar Covalent
When electrons in a covalent bond are not shared equally
Format of Scientific Question
How does (blank) affect (blank)?
Atomic Mass is ...
Protons + Nutrons
Ions
An atom that has lost or gained and Electron (Cation & Anion)
Hydrogen bonds are ...
weak
Format of a Hypothesis
If (blank), then (blank), because (blank)
Atomic Number is ...
The number of Protons
Isotopes
Atoms of the same Element with a different # of Nutrons
What are valance electrons
the electrons in the atoms outermost energy level