2. Atoms & Elements

If calcium ions, each of which has a charge of 2+, are present in a solution, what is the chemical symbol for a calcium ion?

Which of the following best describes a cation?

What charge will chlorine have when it gains one electron?

How do atoms become charged, and how do they balance these charges?

How does sodium become a positively charged ion and chlorine become a negatively charged ion?

What is the net charge of a monatomic ion that has 15 protons and 18 electrons?

What is the name of a positively charged ion?

In the formula NaCl, how many Cl^- ions are present for each Na^+ ion?

Which of the following ions is isoelectronic with Ar?

When are anions formed?

Which of the following best describes the charge on a cation?

Which neutral atom is isoelectronic with F^+?

Which of the following compounds consists of ions?

Which of the following best describes an ion?

Which of the following best describes the ion IF4+?