The Atom Flashcards
1
Q
What is an isotope
A
Atoms with the same number of protons (same element) with a different number of neutrons
2
Q
What 4 physical processes that can be used to separate mixtures
A
-filtration
-chromatography
-crystallisation
-distillation
3
Q
What is the atomic number
A
Number of protons
4
Q
What is the relative atomic mass and charge of sub-atomic particles
A
Electron = 0, -1
Proton = 1, +1
Neutron = 1, 0
5
Q
What did Chadwick discover
A
Neutron
6
Q
What did Niels Bohr discover
A
Electrons orbit in shells
7
Q
Describe nuclear model of the atom
A
dense nucleus with electrons orbiting
8
Q
What things did scientists discover from the alpha scattering experiment
A
-Positive charge
-concentrated into small space
9
Q
What is the plum pudding model
A
sphere of positive charge with negative electrons embedded in it
