2. Atoms & Elements

How many ions with a +1 charge are required to bond with one ion that has a -2 charge to form a neutral compound?

How many protons and electrons are present in the oxide ion, O^{2-}?

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

Which of the following sets of ions forms an isoelectronic series?

Which of the following best describes the charge of an anion?

Aluminum is a Group 3A metal. Which ion does Al typically form?

Which term is used to describe negatively charged ions?

Which of the following represents a species with 39 protons and 36 electrons?

What is an atom that gains electrons in order to become stable called?

Which of the following processes would produce an anion?

What type of ion is formed when an atom loses electrons?

Which of the following ions is isoelectronic with krypton?

What type of ion is formed when an atom loses an electron?

Which ion would bond with a calcium ion (Ca^{2+}) to form a neutral ionic compound?

Which of the following ions is not isoelectronic with the others?