#1
Who discovered the electron?
J.J. Thomson
ExplanationJ.J. Thomson discovered the electron.
#2
What is the charge of a proton?
Positive
ExplanationA proton carries a positive charge.
#3
Who proposed the Plum Pudding Model of the atom?
J.J. Thomson
ExplanationJ.J. Thomson proposed the Plum Pudding Model of the atom.
#4
What is the fundamental charge of an electron?
1.6 x 10^-19 C
ExplanationThe fundamental charge of an electron is 1.6 x 10^-19 Coulombs.
#5
What experiment did Ernest Rutherford conduct that led to the discovery of the atomic nucleus?
Alpha particle scattering experiment
ExplanationErnest Rutherford conducted the Alpha particle scattering experiment, leading to the discovery of the atomic nucleus.
#6
Who discovered radioactivity?
Marie Curie
ExplanationMarie Curie discovered radioactivity.
#7
Who proposed the concept of isotopes?
Frederick Soddy
ExplanationFrederick Soddy proposed the concept of isotopes.
#8
What is the unit of measurement for the mass of an atom?
Dalton
ExplanationThe unit of measurement for the mass of an atom is Dalton.