What Are Ions

The video tutorial explains how ions are formed when atoms gain or lose electrons, resulting in charged particles. Positively charged ions are called cations, while negatively charged ions are anions. Examples include sodium, which loses an electron to form a cation, and oxygen, which gains electrons to form an anion. The tutorial also covers the electronic structures of calcium and chloride ions, highlighting their similarity to noble gases. It discusses the behavior of metals and nonmetals in forming ions and concludes with a summary of ion characteristics.

What happens to an atom when it loses electrons?

• It becomes a cation.

• It becomes an anion.

• It remains neutral.

• It becomes a noble gas.

How is the charge of a sodium ion represented?

• As a subscript next to the symbol.

• As a superscript next to the symbol.

• As a prefix before the symbol.

• As a suffix after the symbol.

Which element gains two electrons to form an oxide ion?

• Nitrogen

• Oxygen

• Fluorine

• Chlorine

What do Group 1 metals like sodium do to form ions?

• Gain one electron

• Lose one electron

• Gain two electrons

• Lose two electrons

Which group of elements tends to form covalent compounds instead of ions?

• Group 5

• Group 1

• Group 3

• Group 4