P7 radioactivity Flashcards
What is the number of protons and neutrons called
Nucleon number/ mass number
What is the number of protons called
Proton number/ atomic number
What is the relative mass of an electron
1/2000 or 1
What is the relative charge of a electron
-1
What is the relative mass of a proton
1 or 2000
What is the relative charge of a proton
+ 1
What is the relative mass of an neutron
1 or 2000
What is the relative charge of an neutron
0
What did John dalton describe the atom as
A solid sphere
What did JJ Thompson describe the atom as
A ball of charge with electrons scattered within
What was jj Thompson model called
Plum pudding model
What was Ernest Rutherford description of an atom
Most of the mass is in the nucleus and most atoms are empty space
What was his experiment called
Alpha scattering experiment
What did neils Bohr describe the atom as
He theorised that electrons were in shells orbiting the nucleus
What did James Chadwick discover
He discovered neutrons in the nucleus
