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Chapter 3: Problem 72

What would the charge on a ion be if, starting from the neutral atom: (a) You add three electrons. (b) You remove four electrons. (c) You add two neutrons to the nucleus.

Short Answer

Expert verified
(a) The charge of the ion will be -3. (b) The charge of the ion will be +4. (c) The charge of the ion will be 0 (neutral).

Step by step solution

01

Case (a): Adding three electrons

If we add three electrons to a neutral atom, the number of electrons will be three more than the number of protons. Since electrons have a charge of -1, and protons have a charge of +1, the overall charge of the ion will be: Charge = (Number of protons) - (Number of electrons) For this case: Charge = (Number of protons) - (Number of protons + 3) = -3 The charge of this ion will be -3.
02

Case (b): Removing four electrons

If we remove four electrons from a neutral atom, the number of electrons will be four less than the number of protons. Continuing with the same charge calculation as the previous case: Charge = (Number of protons) - (Number of electrons) For this case: Charge = (Number of protons) - (Number of protons - 4) = 4 The charge of this ion will be +4.
03

Case (c): Adding two neutrons

In this case, we are adding neutrons to the nucleus of the atom. Neutrons are electrically neutral, meaning they do not have a charge. Thus, adding neutrons will not affect the charge of the atom. Consequently, the charge remains the same as that of the neutral atom: Charge = (Number of protons) - (Number of electrons) For a neutral atom, the number of protons and electrons are equal. Therefore: Charge = (Number of protons) - (Number of protons) = 0 The charge of this ion will be 0 (neutral).

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Most popular questions from this chapter

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