2. Atoms & Elements

Which of the following ions have different numbers of electrons?

How many protons (p) and electrons (e) are found in a Sc^{3+} ion?

When water ionizes, which ions are produced?

How many electrons are present in an O^{2-} ion?

Which of the following elements is most likely to form a cation?

Which neutral atom is isoelectronic with O^{2+}?

Which of the following ions has the same electronic configuration as the noble gas neon (Ne)?

Which process leads to the formation of a cation?

Which ion is formed when an atom of fluorine (F) gains one electron?

What is the charge of an atom that has gained one electron?

How many electrons must a sulfur atom gain to achieve an octet in its valence shell?

Which type of electrical charge is carried by cations?

Which ions are present in the compound CaCl2?

An atom or group of bonded atoms that has a positive or negative charge is called a/an:

What charge will a sodium ion have when it loses one electron?