C2-ionic compounds Flashcards
1
Q
what is an ion?
A
An ion is an atom or group of atoms with a positive or negative charge. Ions form when atoms lose or gain electrons to obtain a full outer shell
2
Q
how do you form a positive ion?
A
- the ions are positive, because they have more protons than electrons
- the ions formed have full outer shells
- the ions have the electronic structure of a noble gas (group 0 element), with a full outer shell
3
Q
how do you form negative ions?
A
- the ions formed are negative, because they have more electrons than protons
- the ions have the electronic structure of a noble gas (group 0 element), with a full outer shell
4
Q
what are properties of ionic compounds?
A
have regular structures, called giant ionic lattices. In a giant ionic lattice, there are strong electrostatic forces of attraction acting in all directions between the oppositely charged ions.
5
Q
how can a substance conduct electricity?
A
A substance can conduct electricity if:
- it contains charged particles, such as ions, and
- these particles are free to move from place to place
6
Q
how can an ionic compound conduct electricity?
A
an ionic compound can conduct electricity when:
- it has melted to form a liquid, or
- it has dissolved in water to form an aqueous solution