The idea of the atom has developed over time. Each element has a number of different isotopes. When nuclei are unstable they may emit ionising radiation to become more stable.
What is the relative mass of the proton?
What is the relative charge on the neutron?
Uranium-235 has 92 protons. How many neutrons does it have?
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?
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
What has an ionised atom lost or gained?
Which form of radiation has the greatest ionising ability?
What is an alpha particle?