- What is the term used for the energy required to remove an electron from an atom in the gas phase?
- A) Electronegativity
- B) Electron affinity
- C) Ionization energy
- D) Atomic radius
- Which of the following elements is in Period 2 and Group 5?
- A) Boron
- B) Carbon
- C) Nitrogen
- D) Oxygen
- Which of the following is a property of transition metals?
- A) High reactivity with water
- B) Variable oxidation states
- C) Low density
- D) High electronegativity
- Which element in Group 2 has the highest atomic number?
- A) Magnesium
- B) Calcium
- C) Strontium
- D) Barium
- Which of the following elements is a lanthanide?
- A) Lutetium
- B) Gold
- C) Thorium
- D) Actinium
- Which of the following elements is in Group 16?
- A) Nitrogen
- B) Oxygen
- C) Fluorine
- D) Chlorine
- Which element has the electron configuration [Ne] 3s² 3p¹?
- A) Aluminum
- B) Silicon
- C) Phosphorus
- D) Sulfur
- Which of the following trends is observed in the Periodic Table with regard to atomic radius?
- A) It decreases from top to bottom within a group.
- B) It decreases from left to right within a period.
- C) It increases from left to right within a period.
- D) It remains constant across periods.
- Which of the following elements is a noble gas and located in Period 6?
- A) Xenon
- B) Radon
- C) Krypton
- D) Helium
- Which element has the electron configuration [Ar] 4s² 3d¹⁰ 4p¹?
- A) Gallium
- B) Indium
- C) Tin
- D) Lead
