Key Terms 1
The force of attraction that holds two atoms together as a result of the rearrangement of electrons between them.
Chemical Bond
The electrons that have the highest energy level and are held most loosely.
Calcium
2
NaCl
Is sodium a metal or nonmetal?
Metal
Combination of symbols that shows the ratio of elements in a compound.
Chemical Formula
includes the symbol for the element surrounded by dots. Each dot stands for one valence electron.
Electron Dot Diagram (Lewis Dot Structure)
Helium
2
NaBr
Sodium Bromide
Is fluorine a metal or non metal
nonmetal
Tells you the ratio of elements in the compound.
subscript
attraction between two oppositely charged ions
Ionic Bond
Bromine
7
Li2S
Lithium Sulfide
What type of bond does Sodium and Fluorine make?
Ionic
Chemical bond when two atoms share electrons
Covalent bond
Polyatomic Atoms
Arsenic
5
MgBr2
Magnesium Bromide
What does the organization of the periodic table tell you?
Answers may vary
When two atoms share three pairs of electrons
Triple Bond
When two atoms share two pairs of electrons
Double Bond
Francium
1
SrI
Strontium Iodide
How many atoms of Sodium and Fluorine are needed to make a compound?
1 Na 1 F