Electrical craft helper exam 2026

Electrical craft helper exam 2026 Molecule Smallest parts of substance can be physically divide into two compose more Atoms. A molecule is a collection of atoms held together by strong forces called chemical bonds. Atom Fundamental constituents of matter. The elements wich come together in various combination to form molecules of many substances Nucleus The center portion of an atom which has a positive electrical charge Proton Single positive electrical charge located in the middle of an atom. Electron Single negative electric charge orbits around the nucleus some and Paths close to the nucleus others and Paths varying distance from the nucleus Coulomb Certain quantity of electrons. The unit of measure that specified the rate at which electric current flows per second Bound Electrons Those electrons in orbit nearest the nucleus, not Easily dislodged from their normal orbit. Free electrons Those electrons in orbit farthest out from the nucleus, loosely bound and migrate from one atom to another. Valance Electron A single electron or one or two or more electrons in the outer shell of and atom that is responsible for the chemical properties of an atom Shells Any of the space occupied by the orbit of a group of electrons of approximately equal surrounding the nucleus of an atom