Capital of the World! Las Vegas is a weekend town for many people, so you may be surprised to learn that there are nearly 2 million current residents in the greater Las Vegas Valley, the vast majority of which have moved to Las Vegas from somewhere else.ost of Living. The impact of cost of living in Las Vegas depends largely on from where you move. On one hand, the city is often referred to as the âninth islandâ because of a large Hawaiian population eager to relocate from the high rents and import fees back home.
If an atom has more or fewer electrons than its atomic number, then it becomes respectively negatively or positively charged as a whole; a charged atom is called an ion. Electrons have been known since the late 19th century, mostly thanks to J.J. Thomson; see history of subatomic physics for details.
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.