2. Atoms & Elements

Which of the following is the correct formula for a potassium ion that has 18 electrons?

Which of the following best explains why the Na^+ ion is smaller than a neutral Na atom?

What ion is formed when an atom of magnesium (Mg) loses two electrons?

Ions are described as ________ if they have the same number of electrons.

Why do cations have a positive charge?

Which of the following atoms or ions is NOT isoelectronic with the others?

Which of the following correctly describes how a lithium cation (Li^+) compares to a neutral lithium atom (Li)?

Which of the following ions is a cation?

Which of the following elements is most likely to form a negatively charged ion?

Which of the following best describes the charge of a cation and how an atom becomes a cation?

How many electrons are present in a Rb^+ ion?

Which process leads to the formation of an anion from a neutral atom?

Which of the following best explains why the chloride ion has a -1 charge?

Which of the following best describes the difference between a standard hydrogen atom and a hydrogen ion?

Which of the following is a primary function of sodium ions (Na+) in the human body?