Multiple Choice
Which region of an atom is responsible for its negative charge?
36
views
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
Which of the following subatomic particles has the least amount of mass?
A
Electron
B
Proton
C
Alpha particle
D
Neutron
Verified step by step guidance1
Recall the three main subatomic particles: protons, neutrons, and electrons, and also consider composite particles like the alpha particle (which consists of 2 protons and 2 neutrons).
Understand that the mass of a proton and a neutron are roughly similar, each approximately 1 atomic mass unit (amu).
Recognize that an alpha particle is made up of 2 protons and 2 neutrons, so its mass is roughly 4 amu, which is greater than either a proton or neutron alone.
Know that the electron has a much smaller mass compared to protons and neutrons, approximately 1/1836 of the mass of a proton.
Conclude that among the given options, the electron has the least amount of mass because it is significantly lighter than protons, neutrons, and alpha particles.
Related Videos
Related Practice
Subatomic Particles practice set
Problem sets built by lead tutorsExpert video explanations