2. Atoms & Elements

Which of the following statements correctly describes the atomic number of a cation formed when a neutral sodium atom loses one electron?

What is the charge on the nitrate ion (NO_3)?

What is the charge on a sodium ion?

Which of the following ions has ten electrons in its outermost n=2 subshell?

Which of the following best describes a cation and its typical location on the periodic table?

What is the most common charge of the copper(II) ion?

Shown below is an ion from a salt molecule. Which statement best explains how this ion was formed?

Which of the following ions is classified as a monatomic ion?

Which of the following is the typical charge of an oxide ion formed by oxygen?

What is the ionic charge of an ion that contains 13 protons and 10 electrons?

In a neutral compound formed from aluminum ions (Al^{3+}) and sulfide ions (S^{2-}), what is the simplest whole-number ratio of Al ions to S ions?

How many electrons are present in a sulfur anion with a -2 charge?

What is the charge on an atom after it gains two electrons during the formation of a bond?

What is the net ionic charge of a calcium ion (Ca^{2+})?

Which ions are formed when MgI_2 dissociates in water?