Lesson: Ions Chemistry • 7th Grade

Students will be able to

• recall the different charges of the particles that make up an atom,
• use the terms anion and cation to describe positive and negative ions,
• use the number of electrons lost or gained from an atom to calculate the overall charge of the ion,
• explain why atoms have no overall charge,
• calculate the number of protons, neutrons, and electrons in atoms and ions,
• relate an element’s position on the periodic table to the likely charge of its common ion,
• define the charges and names of common polyatomic ions to write accurate chemical formulas.