2. Atoms & Elements

Which of the following best describes what it means for two species to be isoelectronic?

A chlorine atom has 18 electrons and 17 protons. What is this atom called?

Which of the following best describes a cation?

A neutral phosphorus atom has 15 electrons. How many electrons are present in a phosphide ion (P^{3-})?

Which process leads to the formation of ions?

The ion configuration for P^{3-} would have the same electron configuration as which element?

Sulfur can form ions with a -2 charge. Is this ion classified as a cation or an anion?

Which of the following is the most stable monatomic ion formed from aluminum?

Which of the following represents the composition of the ion typically formed by fluorine?

When MgBr_2 is dissolved in water, how many ions are produced from one formula unit?

What is the charge on the Cr ion in the ionic compound Cr_2O_3?

Which of the following ions is isoelectronic with Ne?

Which of the following ions is isoelectronic with xenon?

When electrons are removed from the outermost shell of a calcium atom, the atom becomes:

How are anions formed?