TASK DEFINITION: Given a scientific passage and an answer, generate a question for the given answer.
PROBLEM: Passage: In this equation, the letters A and B represent the reactants that begin the reaction, and the letter C represents the product that is synthesized in the reaction. The arrow shows the direction in which the reaction occurs. Answer: reaction mechanism

SOLUTION: What term is used to describe the sequence of elementary steps that together comprise an entire chemical reaction?

PROBLEM: Passage: The composition of the magma determines if the rock is mafic, felsic, or intermediate. Answer: intermediate

SOLUTION: The composition of the magma determines if the rock is mafic, felsic, or what?

PROBLEM: Passage: By losing an electron, the sodium atom becomes a sodium ion. It now has more protons than electrons and a charge of +1. Positive ions such as sodium are given the same name as the element. The chemical symbol has a plus sign to distinguish the ion from an atom of the element. The symbol for a sodium ion is Na + . Answer: electrons

SOLUTION:
Ions can be formed when atoms lose what other particles?