2. Atoms & Elements

Which of the following elements is most likely to form a cation?

For most atoms, how many electrons are needed in the outermost shell to achieve a stable (noble gas) electron configuration?

Which of the following best describes how ions differ from atoms?

An indium ion with a charge of -3 is formed. How many protons and electrons does this ion have?

Which of the following chemical equations correctly represents the second ionization of calcium?

What type of force attracts cations and anions to each other?

What are the two ions that water molecules can dissociate into?

Sodium is much more apt to exist as a cation than is chlorine. This is because ________.

A hydrogen ion, formed during the dissociation of water, has a charge of which of the following?

Which of the following is an example of an anion?

Which ion is represented by the following information? p+ = 12, n = 14, e- = 10

How many electrons are present in an Al^{3+} ion?

Which of the following ions is most likely to be leached from soil due to its high solubility and low tendency to adsorb to soil particles?

What is the charge of the metal ion in the complex [Fe(NH_3)_2Br_4]^{2-}? (Omit the + sign in your answer.)

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