Ions and compounds Flashcards
May be an atom or group of atoms that has gained or lost one or more of its valence electrons.
Ions
An ion is charged. Why?
Because its number of electrons is not equal to its number of protons.
An ion that carries a net positive charge.
Cation
An ion that carries a net negative charge.
Anion
An ion that contains only one type of atom.
Monatomic ion
An ion that contains two or more types of atom.
Polyatomic ion
It is made up of two or more atoms with a definite arrangement that are held together by a chemical bond.
Molecule
Molecules that are composed of elements of the same kind.
Diatomic molecules
4 common properties of ionic compounds
- It has crystalline structures
- High melting and boiling points
- Soluble in water
- Good conductors of electricity
Why do most ionic compounds have high boiling and melting points?
Because of the high electrostatic force that holds the atoms together.
The total number of electrons that an atom gains or loses to form a chemical bond with another atom to achieve a neutral state again.
Oxidation state
There are elements with different oxidation numbers. These are called _____________.
transition elements
The charge of a polyatomic ion is equal to the sum of the oxidation numbers of some atoms. True or False?
False. Pg. 143
Characterized by the sharing of electrons between atoms.
Covalent bonding
4 common properties of covalent compounds
- Mostly liquid and gases at standard conditions
- It has low melting and boiling points
- Soluble in water
- Poor conductors of electricity
