P6.1 - Radioactive Emissions Flashcards
What is the mass of a proton?
1
What is the mass of an electron?
1/2000
what is the mass of a neutron?
1
what is the relative charge of a neutron?
0
what is the relative charge of an electron?
-1
what is the relative charge of a proton?
+1
What does the charge on the nucleus of an atom depend on?
The number of protons in it
What are isotopes?
Atoms of an element with different numbers of neutrons
what does the ‘12’ refer to in the atom:
carbon-12
the total number of subatomic particles in the nucleus
how do you work out the number of neutrons in an atom?
subtract the amount of protons (or atomic number) from the relative atomic mass
What do unstable nuclei emit?
Radiation
Name two things radiation can be made of
Waves and Particles
What do you call materials that emit radiation?
radioactive
What is the symbol for an alpha particle?
α
what is the symbol of a beta particle
β