Unit 3: Periodic Table and Periodicity of Properties

Which of the following elements is a member of the halogens?

• A) Sodium
• B) Calcium
• C) Chlorine
• D) Magnesium

Answer: C) Chlorine

Which element in Group 16 has the highest atomic number?

• A) Oxygen
• B) Sulfur
• C) Selenium
• D) Tellurium

Answer: D) Tellurium

Which element in Period 4 has the electron configuration [Ar] 4s² 3d⁶?

• A) Manganese
• B) Iron
• C) Chromium
• D) Cobalt

Answer: B) Iron

Which of the following elements is most likely to have a charge of +3 in its compounds?

• A) Magnesium
• B) Aluminum
• C) Silicon
• D) Phosphorus

Answer: B) Aluminum

Which of the following elements is found in the p-block of the Periodic Table?

• A) Magnesium
• B) Chlorine
• C) Calcium
• D) Iron

Answer: B) Chlorine

Which element in Group 14 is known for having the lowest electronegativity?

• A) Carbon
• B) Silicon
• C) Germanium
• D) Tin

Answer: D) Tin

Which of the following elements has the highest density?

• A) Lead
• B) Silver
• C) Gold
• D) Platinum

Answer: D) Platinum

Which element in Group 16 is known for its strong oxidizing properties?

• A) Sulfur
• B) Selenium
• C) Tellurium
• D) Oxygen

Answer: D) Oxygen

Which of the following elements is a gas at room temperature and found in Group 18?

• A) Neon
• B) Argon
• C) Krypton
• D) Xenon

Answer: A) Neon

Which element in Group 13 has the highest melting point?

• A) Boron
• B) Aluminum
• C) Gallium
• D) Indium

Answer: A) Boron

Which of the following elements is most likely to form a -1 ion?

• A) Oxygen
• B) Chlorine
• C) Sulfur
• D) Nitrogen

Answer: B) Chlorine