2. Atoms & Elements

Which two ions are most abundant in ocean water?

When NH_4NO_3 is dissolved in water, which ions are formed?

When forming a monatomic ion from a neutral atom, how many electrons can be removed at one time in a single ionization step?

Which of the following species is an ion?

Which of the following ions will form a compound with the bicarbonate ion (HCO_3^-) in a 1:1 cation to anion ratio?

Which of the following statements correctly describes the difference between a cation and an anion?

Which of the following happens when potassium forms an ion?

Which process leads to the formation of an anion?

Which of the following species has the same number of protons as Fe^{3+}?

In a formula unit of CoO, the total oxide ion charge is 2–. What is the charge on each cobalt ion?

Which statement is true of all atoms that are anions?

Which of the following elements tends to form anions when bonding with other elements?

Which two particles have opposite charges?

Which of the following species is isoelectronic with Ne?

The net charge on an atom of a given element changes as ______ are added or removed.