What is the relative mass of the proton?
1
0
1/2,000
What is the relative charge on the neutron?
+1
-1
Uranium-235 has 92 protons. How many neutrons does it have?
143
92
235
What is an isotope?
An atom whose nucleus has the same number of protons but different number of electrons
An atom whose nucleus has the same number of protons but different number of neutrons
An atom whose nucleus has the same number of neutrons but different number of protons
Who suggested the plum pudding model?
Rutherford
Einstein
Thomson
What does most of the alpha particles going straight through the gold foil show?
There is a concentration of mass in the atom
The atom is mostly space
There is a concentration of charge in the atom
What is gamma radiation?
An electromagnetic wave
A helium nucleus
An electron
What has an ionised atom lost or gained?
Protons
Electrons
Neutrons
Which form of radiation has the greatest ionising ability?
Alpha
Beta
Gamma
What is an alpha particle?