The Elements: Sodium

Sodium is a highly reactive element that forms a layer of sodium oxide when exposed to air. It reacts vigorously with water and does not exist in its pure form naturally. Instead, it forms compounds like baking soda and salt. Sodium is essential in our diet for controlling blood pressure and nerve function, but excessive intake can lead to health issues. It is widely used in industries such as glass, paper, and soap manufacturing. Sodium is the sixth most abundant element on Earth, making up a significant portion of the planet's crust and is found in all seas and oceans.

What happens to the cut edge of sodium when exposed to air?

• It forms a layer of sodium oxide.

• It remains unchanged.

• It becomes shinier.

• It melts.

Why does sodium not exist naturally in its pure form?

• It is too rare.

• It is highly reactive.

• It is too heavy.

• It is too expensive to extract.

What is one of the roles of sodium in the human body?

• To increase blood sugar levels.

• To improve vision.

• To control blood pressure.

• To build muscle mass.

What health issue can arise from consuming too much sodium?

• Osteoporosis.

• Heart disease.

• Low blood pressure.

• Diabetes.

In which industries are sodium compounds commonly used?

• Textile and fashion.

• Automobile and aviation.

• Glass, paper, and soap manufacturing.

• Electronics and computing.