The Elements: Phosphorus

Phosphorus is a vital element in the human body, second only to calcium, due to its presence in DNA and its role in energy conversion. It combines with calcium to strengthen bones and glows when exposed to oxygen. Phosphorus is used in various products like toothpaste, matches, and fertilizers, showcasing its versatility.

What is the primary reason phosphorus is the second most abundant mineral in the human body?

• It is a major component of bones.

• It is part of the DNA's phosphate backbone.

• It is found in high amounts in the bloodstream.

• It is stored in the liver.

How does phosphorus contribute to the human skeleton?

• By providing flexibility.

• By enhancing bone density.

• By combining with calcium to provide rigidity.

• By increasing bone length.

What happens to pure phosphorus when it is exposed to oxygen?

• It becomes brittle.

• It glows.

• It dissolves.

• It changes color.

Which of the following is NOT a use of phosphorus?

• Glass making

• Baking powder

• Fireworks

• Toothpaste

Why is phosphorus considered one of the most versatile elements?

• It is used in a wide range of products.

• It is the lightest element.

• It is the most reactive element.

• It is the rarest element on Earth.