Pre assessment Formation of Ions

Among the following, which atom is most likely to form an ion with a charge of 2+?

• O

• Na

• Al

• Ca

The sulfate ion is written in which of the following ways?

• 
• 
• 
• 

The cation Fe3+ is formed when

• an atom of iron loses one electron

• an atom of iron loses two electrons

• . an atom of iron loses three electrons

• an atom of iron gains three electrons

The nonmetals in Groups 5A, 6A, and 7A:

• lose electrons when they form ions

• form positively charged ions

• form ions with charges of 3-, 2-, and 1-, respectively

• form ions with a numerical charge equal to their group number

Which element when combined with chlorine would most likely form an ionic compound?

• lithium

• carbon

• phosphorus

• bromine