객관식
Which subatomic particle's number determines the distinctive properties and identity of an element?
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2. Atoms & Elements
The Atom
객관식
Which of the following is closest to the mass of an electron?
A
9.11 \(\times\) 10^{-28} \(\text{ g}\)
B
1.67 \(\times\) 10^{-27} \(\text{ kg}\)
C
1.67 \(\times\) 10^{-24} \(\text{ g}\)
D
9.11 \(\times\) 10^{-31} \(\text{ kg}\)
검증된 단계별 안내1
Step 1: Understand the units involved. The mass of an electron is commonly given in kilograms (kg) or grams (g). Make sure to compare masses in the same unit system for accuracy.
Step 2: Recall the known mass of an electron, which is approximately \(9.11 \times 10^{-31}\) kg. This is a fundamental constant in chemistry and physics.
Step 3: Convert the given options to the same unit for comparison. For example, convert grams to kilograms by using the conversion factor \(1 \text{ g} = 10^{-3} \text{ kg}\).
Step 4: After converting, compare each option's magnitude to \(9.11 \times 10^{-31}\) kg to see which is closest. Pay attention to the powers of ten, as they indicate the scale of the mass.
Step 5: Identify the option whose value is closest to \(9.11 \times 10^{-31}\) kg after unit conversion. This will be the correct answer representing the mass of an electron.
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