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BELETETEE TELL EE CECE CECEC CEC ESSSESSESEECEECETCTCEVCESS ay t+ (n.d Ions How are ions made from neutral atoms? Why? You have learned that not all atoms of an element are the same. Variation in the number of neutrons results in different isotopes of the element. In this activity we will explore another variation that can take place—the loss and gain of electrons. The exchange of electrons between atoms is a very common way for chemical change to take place. We will see it many times throughout the year. Tons 1. Use Model 1 on page 54 to complete the following table. Is the number of | Is the number of | Is the number of Charge Metal or | protons the same |neutrons the samelelectrons the same| . - : on the Nonmetal in the atom in the atom in the atom ion and the ion? and the ion? and the ion? Lithium metal yes yes no 1+ | Magnesium metal yes yes no 2+ | Aluminum metal yes yes no 3+ Fluorine nonmetal yes yes no l- Oxygen nonmetal yes yes no } 2+ Nitrogen nonmetal yes yes no 3- 2. Based on the table you completed in Question 1, what distinguishes a neutral atom from an ion? _ A change in the number of electrons, 3, Examine the isotope symbols in Model 1. a, Where is the ion charge located in the isotope symbol? Upper right corner of the symbol. 6, Isa charge indicated on the neutral atoms? If yes, where is it located? < There is no charge indicated. — 4, Which subatomic particle carries a positive charge? Protons 5. Which subatomic particle carries a negative charge? Electrons . Propose a mathematical equation to calculate the charge on an ion from the number of protons and electrons in an ion. Confirm that your equation works using two positive ion examples and two negative ion examples from Model 1. Number of protons — number of electrons = charge 53 
