Essential Questions
1. How do the two major forms of elemental phosphorus differ in their properties and applications?
2. What was the process of isolating elemental phosphorus for the first time?
3. In what ways does phosphorus play essential roles in sustaining life?
4. How are phosphorus compounds commonly used in various applications?
5. What are the distinguishing properties of white phosphorus compared to other forms?
6. How does white phosphorus differ from red phosphorus in terms of properties and applications?
Learning Objectives
1. Identify the two major forms of elemental phosphorus 2. Identify the main uses of phosphorus compounds 3. Explain the origin of the name 'phosphorus' 4. Understand the role of phosphorus in sustaining life
5. Recognize examples of compounds containing the phosphate ion 6. Explain the importance of phosphorus in plant growth
7. Understand the concept of allotropes in relation to phosphorus 8. Compare the properties of white and red phosphorus
9. Understand the potential dangers of white phosphorus Questions
1. What is the symbol for phosphorus and its atomic number?
A. Pt, 17 B. Po, 14 C. P, 15 D. Ph, 16
○ Correct answer: C. P, 15
2. What is the chemical symbol for phosphorus and its atomic number?
A. Ph, 16 B. Po, 14 C. P, 15 D. Pt, 17
○ Correct answer: C. P, 15
3. In which form does phosphorus generally occur in minerals?
A. Phosphate B. Sulfate C. Carbonate D. Nitrate
○ Correct answer: A. Phosphate
4. When was white phosphorus first isolated as an elemental form?
A. 1555 B. 1743 C. 1820 D. 1669
○ Correct answer: D. 1669
5. How is phosphorus classified in the periodic table?
A. Pnictogen B. Alkali metal C. Halogens D. Transition metal
○ Correct answer: A. Pnictogen
6. What role does phosphorus play in sustaining life?
A. Energy production B. Cell structure
C. DNA and RNA synthesis D. All of the above
○ Correct answer: D. All of the above 7. What are the main uses of phosphorus compounds?
A. Food preservatives B. Fertilizers
C. Detergents D. All of the above
○ Correct answer: D. All of the above
8. What are the two most common allotropes of phosphorus?
A. White and blue phosphorus B. Red and green phosphorus C. White and red phosphorus
D. Black and yellow phosphorus
○ Correct answer: C. White and red phosphorus 9. Which allotrope of phosphorus is the most toxic and reactive?
A. Blue phosphorus B. Green phosphorus C. White phosphorus D. Red phosphorus
○ Correct answer: C. White phosphorus
10. What makes white phosphorus highly flammable in air?
A. It is cold
B. It contains oxygen C. It is pyrophoric D. It reacts with nitrogen
○ Correct answer: C. It is pyrophoric
