Please enable JavaScript.
Coggle requires JavaScript to display documents.
Chapter 5: Radioactivity - Coggle Diagram
Chapter 5: Radioactivity
Nucleus of an Atom
-
Each atom has a very small and very dense core known as nucleus and electrons move in orbits around the nucleus
Most of the mass of atom is contained in the nucleus. Nucleus consists of a number of protons and neutrons.
A protons has a positive charge, and a neutron is an uncharged particle of the same mass as the proton
Nuclide
-
-
-
An atom of a particular structure, having its own
particular nucleon number and proton number
-
Radioactive Decay
-
-
-
-
Half-life
The time take for the unstable atoms to decay to half of its original value or, half-life is the time take for its activity to fall to half of its original value
-
Nuclear Energy
The mass of an atom is very small and is difficult to measure in a common unit of mass such as grams or kilograms.
-
-
-
Nuclear Fission
The splitting of a heavy nucleus into two lighter nuclei, which emits either two or three neutrons and releases large amounts of energy
-
Nuclear Fusion
The combining of two lighter nuclei to form a heavier nucleus with the release of large amount of energy.
-
According to Einstein, the relationship between mass and the
energy is given by the equation
Where E = energy released, m = mass defect (loss of mass) and c= speed of light (3 x 10^8 m/s)
