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A scientist conducts a number of experiments with rudimentary equipment, and attempts to measure the electric charge of an ionized atom. A student is then assigned to examine the four estimates of the charge for the chemical ion. Two of these estimates make logical sense.

Which of the following values are the most logical estimates for the charge of an ionized atom? Select TWO answers.

A

$+4.8 \times { 10 }^{ -19 }\text{ C}$

B

$+1.3\times { 10 }^{ -19 }\text{ C}$

C

$+3.15 \times { 10 }^{ -19 }\text{ C}$

D

$+5.5 \times { 10 }^{ -21 }\text{ C}$

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