Understanding Ions and Their Formation

What is an ion?

• A charged particle

• A stable atom

• A neutral particle

• A type of molecule

Why are group 1 elements more likely to form ions?

• They are non-reactive

• They have a full outer shell

• They gain electrons easily

• They require less energy to lose one electron

Which group of elements is least likely to form ions due to high energy requirements?

• Group 2

• Group 6

• Group 1

• Group 3

How would you represent the formation of a sodium ion in a chemical equation?

• Na + e+ -> Na+

• Na -> Na- + e+

• Na + e- -> Na-

• Na -> Na+ + e-

What happens to electrons in the formation of a chloride ion?

• Electrons are lost

• Electrons are unchanged

• Electrons are gained

• Electrons are shared