Physical properties of Period 3 elements Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Which Period 3 element has the highest first ionisation energy?
- A. Sodium
- B. Chlorine
- C. Argon
- D. Phosphorus
2. Why is the first ionisation energy of aluminium lower than that of magnesium?
- A. Its outer electron is in a 3p sub-shell, higher in energy than 3s
- B. Aluminium has fewer protons
- C. Aluminium has a larger atomic radius
- D. Aluminium has paired outer electrons
3. Why does the melting point of sulfur exceed that of chlorine?
- A. S–S bonds are weaker than Cl–Cl bonds
- B. S₈ is a giant covalent structure
- C. Sulfur has metallic bonding
- D. S₈ molecules have more electrons, so stronger London forces
4. Why does magnesium have a higher melting point than sodium?
- A. Mg has an ionic charge of 1+
- B. Mg²⁺ ions have a greater charge and there are two delocalised electrons per atom, so stronger metallic bonding
- C. Mg has a giant covalent structure
- D. Mg has weaker London forces
5. Which describes what happens when silicon melts?
- A. London forces between molecules are overcome
- B. Metallic bonds between ions and electrons are broken
- C. Many strong covalent bonds are broken
- D. Ionic bonds are broken