Understanding Ions and Their Formation

What is an ion?

• A type of molecule

• A specific kind of atom

• A charged particle formed by the gain or loss of electrons

• A neutral particle

What do you call a positively charged ion?

• Anion

• Cation

• Neutron

• Proton

How does sodium become a positively charged ion?

• By gaining a proton

• By losing a neutron

• By gaining an electron

• By losing an electron

What is the charge of an oxide ion?

• +1

• -1

• +2

• -2

Which noble gas does the electronic structure of a sodium ion resemble?

• Helium

• Neon

• Argon

• Krypton

What is the electronic structure of a calcium ion after it loses two electrons?

• 2, 8

• 2, 8, 8

• 2, 6

• 2, 8, 2

Which group do metals that form +1 ions belong to?

• Group 1

• Group 2

• Group 3

• Group 4

How many electrons does oxygen gain to form an ion?

• 1

• 2

• 3

• 4

What charge does an aluminum ion have?

• +2

• +1

• +3

• -3

What is true about the ions formed from elements in group four?

• They do not form ions

• They tend to form covalent compounds

• They form -4 ions

• They form +4 ions