1-15-1. Which of the following describes a cation?
A. an aluminum ion (Al3+),
B. an oxygen atom that has gained 2 electrons,
C. an ion with 17 protons and 18 electrons,
D. an ion with more neutrons than protons
1-15-2. Which of the following describes an anion?
A. a sodium ion (Na+),
B. a calcium atom that has lost 2 electrons,
C. an ion with 8 protons and 10 electrons
