LIFE 102 Lecture Notes - Lecture 2: Covalent Bond, Sodium Chloride, Electron Configuration
Document Summary
Lack of some atoms such as nitrogen or iodine can cause a lot of harm. You cannot tell exactly where the electrons will fall in the nucleus area. Protons: will always have a positive charge of +1. Mass number:total number of protons + neutrons in the aroms. Atomic mass: total mass of the atoms in daltons= protons+neutrons+electrons. Atomic number: number of protons in the atom. Isotopes- two atoms of the same element can differ in the number of neutrons. Some isotopes like carbon 14 can be radioactive. A rare isotope of nitrogen has 7 protons and 8 neutrons- c15-7-n. In a typical atom the number of electrons= number of protons and could be
