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.
Because the nucleus can't hold the 18 electrons in the Cl-ion as tightly as the 17 electrons in the neutral atom, the negative ion is significantly larger than the atom from which it forms. For the same reason, positive ions should be smaller than the atoms from which they are formed. The 11 protons in the nucleus of an Na+ ion, for example, should be able to hold the 10 electrons on this ion more tightly than the 11 electrons on a neutral sodium atom.