Unit 3: Periodic Table and Periodicity of Properties

Which of the following elements is a member of the alkaline earth metals?

• A) Beryllium
• B) Boron
• C) Carbon
• D) Nitrogen

Answer: A) Beryllium

Which element in Group 7 is the most electronegative?

• A) Bromine
• B) Iodine
• C) Fluorine
• D) Chlorine

Answer: C) Fluorine

Which of the following elements has the highest atomic number?

• A) Calcium
• B) Argon
• C) Titanium
• D) Scandium

Answer: C) Titanium

Which element in Period 5 has the electron configuration [Kr] 5s² 4d¹⁰ 5p⁴?

• A) Iodine
• B) Tellurium
• C) Selenium
• D) Tin

Answer: C) Selenium

Which property of an element is most affected by its position in the Periodic Table?

• A) Atomic mass
• B) Atomic radius
• C) Electron affinity
• D) Density

Answer: B) Atomic radius

Which of the following elements has the highest first ionization energy?

• A) Lithium
• B) Beryllium
• C) Boron
• D) Carbon

Answer: D) Carbon

Which group of elements is known for having similar chemical properties due to having the same number of valence electrons?

• A) Transition metals
• B) Noble gases
• C) Halogens
• D) Alkali metals

Answer: D) Alkali metals

Which of the following elements is a d-block element?

• A) Iron
• B) Phosphorus
• C) Nitrogen
• D) Oxygen

Answer: A) Iron

Which element has the electron configuration [Xe] 6s² 4f¹²?

• A) Neodymium
• B) Samarium
• C) Dysprosium
• D) Gadolinium

Answer: D) Gadolinium

Which of the following elements would have the smallest ionic radius?

• A) Fluoride ion
• B) Chloride ion
• C) Bromide ion
• D) Iodide ion

Answer: A) Fluoride ion