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.
A neutral sodium atom, for example, contains 11 protons and 11 electrons. By removing an electron from this atom we get a positively charged Na+ ion that has a net charge of +1. Atoms that gain extra electrons become negatively charged. A neutral chlorine atom, for example, contains 17 protons and 17 electrons. By adding one more electron we get a negatively charged Cl- ion with a net charge of -1. The gain or loss of electrons by an atom to form negative or positive ions has an enormous impact on the chemical and physical properties of the atom.