Html viewer was selected to open .htm files and that would not handle mailto: and other links. This app reset that and then next time I opened the file it asked what app to use and I could select Browser (or Chrome). Perfect. At times, I want to use Chrome to open an .html file that I put on my tablet.
Neutrons have a mass of 1.675 Ã 10-24g, which is a little heavier than the proton. Neutrons are 1839 times heavier than electrons. Like all hadrons, neutrons are made of quarks. A neutron is made of two down quarks and one up quark. One up quark has a charge of +2/3, and the two down quarks each have a charge of -1/3.
The term nucleon refers to the particles found in the nucleus of an atom, namely protons and neutrons. A single hydrogen atom (one proton plus one electron) has a mass of 1.007825 amu.A single neutron has a mass of 1.008665 amu. Note that amu stands for atomic mass unit and is sometimes abbreviated with the symbol u.he total mass of the individual nucleons in an atom is always greater than the actual measured mass of the atom. The difference is called the mass defect. The mass defect of an atom corresponds to an amount of energy called the binding energy.