Ions Flashcards
1
Q
What are ions
A
Ions are atoms that have lost or gained electrons in order to achieve a stable, full electron outer shell
2
Q
What causes ions to have a positive charge
A
by losing electrons
3
Q
What causes ions to have a negative charge
A
by gaining electrons
4
Q
how can you calculate the number of electrons in an atom when it has a charge
A
number of electrons = atomic number - charge on the ion
5
Q
What does ionic formulae tell us
A
the simplest ratio of each type of ion in the substance and can show the charges on each ion
