2. Atoms & Elements

What is a hydrogen ion?

Which of the following ions are negatively charged?

When sodium forms its common ion, Na^+, how many protons and electrons does it have?

When aluminum forms an ion, how many electrons does it gain or lose?

Which of the following ions has the same electron configuration as a noble gas?

Is a charge indicated on neutral atoms? If yes, which of the following statements is correct?

Which two ions are most abundant in ocean water?

If an atom loses two electrons, what will be its resulting charge?

Which of the following best describes how a negative ion (anion) is formed?

What is the charge of a magnesium ion (Mg^{2+})?

Which term is used to describe particles that carry a negative or positive electric charge?

Which of the following is a cation?

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

How does an atom become a cation?

What is the charge of a hydroxide ion (OH)?