Radioactive Decay and Atomic Models

Front

Radioactive decay

Back

Process where unstable nuclei lose energy by emitting radiation

Front

Half-life

Back

Time taken for half of a radioactive substance to decay

Front

Isotopes

Back

Atoms of the same element with different numbers of neutrons

Front

Chemical reactions

Back

Process where substances are transformed into different substances

Front

Dalton's atomic model

Back

Atoms as solid, indivisible spheres

Front

Thomson's atomic model

Back

Plum pudding model with electrons in a positive sphere

Front

Rutherford's atomic model

Back

Nucleus with electrons orbiting around it

Front

Bohr's atomic model

Back

Electrons in fixed orbits around the nucleus

Front

Modern atomic model

Back

Quantum mechanical model with electron clouds

Front

Alpha decay

Back

Emission of an alpha particle (2 protons, 2 neutrons)