Multiple Choice
Which subatomic particle is most equal to a neutron in mass?
2. Atoms & Elements
Subatomic Particles
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
According to the table above, how many electrons are required to produce a charge of –2.0 C?
A
1.3 × 1019 electrons
B
2.0 × 1019 electrons
C
4.2 × 1020 electrons
D
8.5 × 1020 electrons
Verified step by step guidance1
Understand that the charge of a single electron is approximately \(-1.602 \times 10^{-19}\) coulombs. This is a fundamental constant in chemistry and physics.
To find the number of electrons needed to produce a charge of \(-2.0\) coulombs, use the formula: \( \text{Number of electrons} = \frac{\text{Total charge}}{\text{Charge of one electron}} \).
Substitute the values into the formula: \( \text{Number of electrons} = \frac{-2.0 \text{ C}}{-1.602 \times 10^{-19} \text{ C/electron}} \).
Perform the division to calculate the number of electrons. This involves dividing the total charge by the charge of a single electron.
Compare the calculated number of electrons with the options provided to determine which one is correct.
Related Videos
Related Practice
Subatomic Particles practice set
Problem sets built by lead tutorsExpert video explanations