GCSE-AtomicStructure15 Flashcards
In the plum-pudding model of the atom, the negative electrons are …?
embedded in a positive sphere
The lightest Hydrogen Isotope
Protium ¹H₁
The second-lightest Hydrogen isotope
Deuterium ²H₁
The heaviest Hydrogen isotope
Tritium ³H₁
Isotopes of the same element have the same number of…?
protons
Isotopes of the same element have different numbers of…?
neutrons
The Bohr-Rutherford model of the atom pictures all of its positive charge and most of its mass in the…?
nucleus
The Bohr-Rutherford model of the atom pictures the electrons in allowed orbits …?… the nucleus.
outside
The atomic mass number of a proton is …?
1
The charge of a proton is…?
1
The atomic mass number of an electron is …?
0
The charge of an electron is …?
-1
The charge of a neutron is…?
0
The atomic mass number of a neutron is …?
1
The particles directed at a target in the Rutherford Scattering experiment
Alpha
The target in the Rutherford Scattering experiment
thin Gold foil
The fact that most Alpha particles were undeflected proved that the nucleus was very …?
small
The fact that some Alpha particles were deflected back proved that the nucleus had a large …?
mass
The fact that the Alpha particles were repelled by the nucleus proved that the nucleus was …?
positively charged
