4. Atoms and Elements

When an atom loses an electron, it becomes a:

If an atom gains or loses electrons, it becomes a:

In ion formation, if an atom loses an electron, it becomes a(n):

To become positively charged (form a cation), an atom must:

Gallium commonly forms a $G^a$ ion. What is the electron configuration of $G^a$?

In introductory chemistry, what is an atom called when it has gained or lost electrons?

Which element forms an ion that has 17 protons and 18 electrons?

In terms of subatomic particles, what makes an atom electrically neutral?

In introductory chemistry, what is the key difference between an atom and an ion?

Which statement is true about a charged atom (ion)?

Which relationship is true of an uncharged (neutral) atom?

In a typical ionic compound (e.g., sodium chloride), what is the net charge of the compound as a whole?

A neutral atom becomes a positive ion when it:

What is the term for an atom that has gained or lost electrons and therefore has a net electrical charge?

Which electron configuration is correct for a sodium ion, ${\mathrm{Na}}^{+}$?