How is the sea of electrons model is used to explain the physical properties of metals? electrons give off a charge, the greater or lesser the metal will depend on how packed the universe is in the metal, atoms and such.
Mutations can also be caused by exposure to specific chemicals or radiation. These agents cause the DNA to break down. This is not necessarily unnatural  even in the most isolated and pristine environments, DNA breaks down. Nevertheless, when the cell repairs the DNA, it might not do a perfect job of the repair.
Cancer is caused by changes (mutations) to the DNA within cells. The DNA inside a cell is packaged into a large number of individual genes, each of which contains a set of instructions telling the cell what functions to perform, as well as how to grow and divide.Errors in the instructions can cause the cell to stop its normal function and may allow a cell to become cancerous. gene mutation can instruct a healthy cell to: 1  Allow rapid growth. 2  A gene mutation can tell a cell to grow and divide more rapidly. 3  This creates many new cells that all have that same mutation. 4  Fail to stop uncontrolled cell growth.