Galileo Galilei (1564-1642) â Astronomer and Scientist. Galileo developed a superior telescope and made many significant discoveries in astronomy.He was sentenced to life imprisonment by the inquisition for his support for the Copernican theory that the sun was at the centre of the solar system.alileo Galilei (1564-1642) â Astronomer and Scientist. Galileo developed a superior telescope and made many significant discoveries in astronomy.
Virtually all particles in the air have a positive charge, while negative ions have a negative charge. In which case, negative ions and particles magnetically attract to one another. When there is a high enough concentration of negative ions in the air, they will attract to floating particles in large numbers.
For example, a neutral atom of fluorine, F, has 9 protons and 9 electrons. Because the positive and negative charges balance, it can be said that a fluorine atom has a zero net charge. It is possible for a neutral atom to lose or gain one or more electrons. In this case, the atom becomes charged and is called an ion. In the case of fluorine, it can gain one electron. Since an electron is a negatively charged species, it will have one more negative charge than positive charge, and therefore the charge on fluorine will be -1. Cations. A cation is a positively charged ion. Therefore, it is formed when a neutral atom loses one or more electrons. This is because the ion will have more positively charged protons than negatively charged electrons upon the loss of electron(s). An example of a cation is sodium after losing one electron.