Worksheet 6.1 Ions
1. Define ion
2. An atom or group of atoms with a positive charge is called
a(n)___________________________.
3. An atom or group of atoms with a negative charge is called
a(n)___________________________.
4. When an atom gains an electron it will have a _______________ charge.
5. When an atom loses an electron it will have a ________________ charge.
6. Complete the following table:
Symbol
Cr3+
Protons
50
Electrons
46
35
18
Net Charge
-2
19
27
19
-1
+2
A word about the names of ions
Cations
For elements such as sodium or magnesium which only form ions of a single
charge, the ion is referred to by the name of the element followed by the word ion.
Ex.
Na sodium
Na1+ sodium ion
Mg magnesium
Mg2+ magnesium ion
Anions
For anions consisting of a single element, the name of the element is modified by
taking the stem of the element and adding and ide ending
Ex.
S2-
sulfur 
sulfide
7. Write the names of the anions for the following elements in the grid:
C
N
O
F
Si
P
S
Cl
As
Se
Br
Te
I
8. Give the symbol and charge for the following:
A. cesium ion
B. oxide ion
C. calcium ion
D. aluminum ion
E. chloride ion
F. zinc ion
G. silver ion
9. If element 120 is discovered. What charge ion would it make?
10. Which elements are most likely to form ionic compounds?
11. The vast majority of compounds contain carbon. Is carbon likely to form ionic
compounds? Explain.