Which of the following elements has the smallest ionization energy?
- A) Helium
- B) Neon
- C) Argon
- D) Krypton
Answer: D) Krypton
Which element in Group 16 is known for forming strong acids when combined with hydrogen?
- A) Oxygen
- B) Sulfur
- C) Selenium
- D) Tellurium
Answer: B) Sulfur
Which of the following elements is most likely to form an anion with a -2 charge?
- A) Fluorine
- B) Chlorine
- C) Oxygen
- D) Sulfur
Answer: D) Sulfur
Which element has the electron configuration [Kr] 5s² 4d⁹?
- A) Silver
- B) Palladium
- C) Rhodium
- D) Copper
Answer: D) Copper
Which of the following elements has the highest atomic number?
- A) Yttrium
- B) Zirconium
- C) Niobium
- D) Molybdenum
Answer: D) Molybdenum
Which element in Group 1 has the highest melting point?
- A) Sodium
- B) Potassium
- C) Lithium
- D) Rubidium
Answer: C) Lithium
Which element is the most reactive halogen?
- A) Chlorine
- B) Bromine
- C) Fluorine
- D) Iodine
Answer: C) Fluorine
Which of the following elements would you expect to have a relatively high density?
- A) Sodium
- B) Potassium
- C) Calcium
- D) Iron
Answer: D) Iron
Which of the following elements is in Period 3 and Group 14?
- A) Aluminum
- B) Silicon
- C) Phosphorus
- D) Sulfur
Answer: B) Silicon
Which property generally increases as you move across a period from left to right?
- A) Atomic radius
- B) Electronegativity
- C) Metallic character
- D) Chemical reactivity
Answer: B) Electronegativity
Which element is found in Period 2 and has the electron configuration [He] 2s² 2p¹?
- A) Boron
- B) Carbon
- C) Nitrogen
- D) Oxygen
Answer: A) Boron
Which element in Group 3 has the electron configuration [Kr] 5s² 4d¹⁰ 5p¹?
– A) Indium
– B) Thallium
– C) Gallium
– D) Aluminium