Particles and Radiation Flashcards
1
Q
Alpha particle
A
a slow moving but strongly ionizing positive particle made up of 2 protons and neutrons
2
Q
Beta particle
A
a fast moving but weakly ionizing negative particle that are usually positrons or electron
3
Q
Gamma particle
A
a light speed highly penetrating electromagnetic wave but are easily absorbed. They are less ionizing than alpha and beta
4
Q
Who made the models of atoms in order
A
John Dalton
J.J Thompson
Ernest Rutherford
Niels Bohr
5
Q
All models
A
John Dalton- Billiard Ball Model
J.J Thompson- Plum Pudding Model
Ernest Rutherford- Electron Orbit Model
Niels Bohr- Electron Shell Model
6
Q
Half-life
A
The time taken for the quantity of a substance to decrease by half of its original value
