Question

question 15 (1 point)
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the number of electrons, protons and neutrons in the s²⁻ ion would be __________ and __________

1. 16 electrons, 32 protons, 32 neutrons
2. 18 electrons, 18 protons, 18 neutrons
3. 18 electrons, 16 protons, 16 neutrons
4. none of the above

Explanation:

Step1: Identify element

S is sulfur, atomic number = 16.

Step2: Determine proton number

Proton number = atomic number = 16.

Step3: Calculate electron number

S²⁻ is an anion. Neutral sulfur has 16 electrons. Gain 2 electrons for S²⁻, so 16 + 2=18 electrons.

Step4: Find neutron number

For sulfur - 32 isotope (common), mass number = 32. Neutron number = mass number - proton number = 32 - 16 = 16 neutrons.

Answer:

1. 18 electrons, 16 protons, 16 neutrons