2. Atoms & Elements

What is the term used to describe an atom that has gained or lost electrons and thus carries a charge?

What type of charge does an oxygen atom typically have compared to hydrogen atoms in a water molecule?

An atom has nine protons and ten electrons. This makes it:

A cation with a charge of +2 indicates that an element has:

Which statement best describes the difference between an atom and an ion?

What compound is formed when positive sodium ions combine with negative chloride ions?

Which of the following best describes the charge of a proton?

Which type of electrical charge is carried by a cation?

An atom or a molecule with either a positive or negative charge is referred to as a(n):

Which of the following best describes what it means for two species to be isoelectronic?

A chlorine atom has 18 electrons and 17 protons. What is this atom called?

Which of the following best describes a cation?

A neutral phosphorus atom has 15 electrons. How many electrons are present in a phosphide ion (P^{3-})?

Which process leads to the formation of ions?

The ion configuration for P^{3-} would have the same electron configuration as which element?