Occurrence and Characteristics — Prelims Questions

Which of the following elements is most abundant in the Earth's crust?

Which of the following properties generally decreases across a period from left to right in the periodic table?

Which of the following is an example of an element found in its native state?

Which of the following oxides is amphoteric in nature?

Which of the following statements regarding electron gain enthalpy (EGE) is incorrect?

Which of the following is an ore of aluminum?