Atoms Flashcards
1
Q
Atomic radius
A
0.1 nm
2
Q
Protons
A
-Relative charge of +1
-Relative mass of 1
3
Q
Neutrons
A
-Relative charge of 0
-Relative mass of 1
4
Q
Electrons
A
-Relative charge of -1
-Relative mass of 1/2000
5
Q
Mass number
A
Protons + neutrons
6
Q
Atomic number
A
Protons
7
Q
Development of the atomic model
A
-Dalton (spheres)
-JJ Thomson Plum Pudding (positive ball with negative electrons dotted around)
-Rutherford (gold foil experiment showing electrons are around positive nucleus)
-Bohr (energy levels)
-Chadwick (neutrons)
8
Q
What are isotopes?
A
Atoms of the same element with the same number of protons, different number of neutrons
