2. Atoms & Elements

What must happen to an atom of magnesium in order to become a magnesium ion, Mg^{2+}?

Which of the following best describes the difference between cations and anions?

Which element forms an ion with an electron configuration of [Kr] and a 2− charge?

Which type of atoms typically form cations?

An anion has a(n) _____ charge.

Which of the following best describes the formation of a cation?

Which of the following ions is a cation?

Why do atoms form ions?

Which of the following statements about ions is true?

Which of the following correctly identifies the cation and anion present in the compound CrO2?

Which of the following ions does NOT have a noble gas electron configuration in its ground state?

Which of the following species are isoelectronic with ne?

Which set of properties correctly describes a bromine-79 atom with a -1 charge?

What is the net charge of an ion that consists of 10 electrons and 9 protons?