Ions and Formulas Flashcards
What groups are most likely to from ions?
1 and 2.
6 and 7.
When an atoms loses or gains an electron it becomes?
An ion .
What electronic structure do ions have?
Electronic structure of a noble gas.
What are group 1 and 2 elements?
Metals.
What do group 1 and 2 elements do?
Lose electrons to form positive ions.
What are group 1 elements called?
The alkali metals.
How do group 1 elements form ionic compounds with non-metals?
Where the metal ion has a 1+ charge.
What are group 6 and 7 elements?
Non-metals.
What do group 6 and 7 elements do?
Gain electrons to form negative ions.
What are group 7 elements called?
The halogens.
How do group 7 elements form ionic compounds with the alkali metals?
Where the halide ion has a 1- charge.
The charge on the positive ions is the same as what?
The group number of the element.
Name 3 positive ions in group 1?
Li+ - Lithium.
Na+ - Sodium.
K+ - Potassium.
Name 3 positive ions in group 2?
Be2+ - Beryllium.
Mg2+ - Magnesium.
Ca2 + - Calcium.
Name a negative ion in group 6?
O2- - Oxygen.
Name 2 negative ions in group 7?
F- - Fluorine.
Cl- - Chlorine.
What is made when the positive ions combine with any of the negative ions?
Ionic compounds.
How are ionic compounds only formed?
By elements at opposite sides of the periodic table.
When one becomes a positive ion and one becomes a negative ion.
What do the + and - charges tell you?
What type of ion the atom will form in a chemical reaction.
In a sodium metal there are only…
Neutral sodium atoms.
Na+ only appears when…
Sodium metal reacts with something like water or chlorine.
What are ionic compounds made up of?
Positively charged part.
Negatively charged part.
What is the overall charge of any compound?
Zero.
In a compound all negative charges must do what?
Balance all the positive charges.
You can use the charges on individual ions to work out what?
The formula for the ionic compound.
