Atomic structure and the periodic table Flashcards
1
Q
What is an element
A
Substance made up of only one type of atom
2
Q
What is an isotope
A
Atoms of the same element with different numbers of neutrons
3
Q
Explain Rutherford model
A
The alpha scattering particle dash most alpha particles went straight through meaning atom mostly empty
4
Q
Explain Bohr’s model
A
Electrons in the shells orbiting the nucleus
5
Q
Explain Chadwicks discovery
A
Discovered the neutron
6
Q
What is the mass of the particles in the atom
A
Proton - one, neutron - one electron -very small
7
Q
What is the mass number represent
A
Number of protons and neutrons
