Ions
Magnessium bromide is an ionic compound with the chemical formula AlCl3 What does the 3 tell you?
What is there are three chlorine ions for every aluminum ion
A combination of symbols that show the ratio of elements in a compound
What is chemical formula
In what state of matter do ions conduct electricicty
What is liquid The ions in soild cyrstals are tightly packedand cannot move. If the ions cannot move there is no current.
A molecular compound is
What is a compound that is composed of molecules
what is a molecule
What is a neutral group of atoms joined by covalent bonds
When an atom loses an electron it becomes a
What is positive ion
What is the chemical name of CaF2
Calcium Flouride
The attraction of a postive and negative ion results in a
ionic bond
When electrons are ___________________between two atoms, a covalent bond is formed
What is shared
Molecules that contain two polar bonds are______________
What is sometimes polar
An ionic bond is__________
What is the attraction of oppositely charged ions
Name this compound NA2CO3 2 and 3 are a subscript
Sodium Carbonate
Identify the property of Ionic bonds. 1)They have low melting points 2)They have low boiling points 3)The form hard, brittle crystals with characteristics shape 4)They contian no charges
they form hard, britle crystals with characteristics shape
what is a nonpolar bond
a covalent bond in which electrons are equally shared
A chemical bond that is formed when two atoms share electrons is called
covalent bond
Ions that are made of more then one atom are examples of
polyatomic ions
When ions having a positive charge form bonds with ions having a negative charge, the charge on the resulting compound is
Neutral or Zero
Ionic compounds are electrically
neutral
Which is a property shared by most molecular compounds?
low melting points
What is a double bond
What is two pairs of electrons that are shaired between two atoms
When an atom gains an electron it becomes a
negative ion
Hydroxide(OH-) and Cyanide(CN-) are examples of
polyatomic ions
What are the three properties of Ionic bonds?
1)Ionic crystals 2)High Melting Points 3)Electrical Conductivity
What are three properties of molecular compounds
low melting points, low boiling point, and poor conductivity
A covalent bond in which electrons are shared enequally is called
Polar