Question

question 15 (5 points)
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a certain polyatomic ion contains 49 protons and 50 electrons. whats the net charge of this ion?
a) -2
b) +2
c) +1
d) -1

Explanation:

Step1: Recall charge of proton and electron

Protons have a charge of \(+1\) and electrons have a charge of \(-1\).

Step2: Calculate total positive charge

Total positive charge from protons: \(49\times(+1)= + 49\)

Step3: Calculate total negative charge

Total negative charge from electrons: \(50\times(-1)=-50\)

Step4: Calculate net charge

Net charge = total positive charge + total negative charge = \(+49+(-50)=49 - 50=-1\)

Answer:

D) \(-1\)