The atomic mass unit, or amu, is 1/12 the mass of one atom of carbon-12. An atomic mass unit has the mass of 1/(6.0221415 * 10^23) grams.
According to HowStuffWorks, an atomic mass unit is defined as the mass of a single proton or neutron. Hydrogen, the lightest element, has an average mass of 1.00794 amu. A carbon-12 atom is made up of six protons and six neutrons, hence 12 atomic mass units. The mass of the electron is considered negligible, therefore electrons are not counted in measuring an atom's atomic mass. One mole of carbon-12 atoms, or 6.0221415 * 10^23 atoms, weighs exactly 12 grams.Learn More
Ionic bonds form between atoms that transfer electrons to one another. These bonds require at least one electron donor and one electron acceptor. During ionic bonding, a complete transfer of valence electrons takes place between atoms.Full Answer >
Nitrogen is a diatomic element. There are six other diatomic elements: hydrogen, oxygen, fluorine, chlorine, iodine and bromine. Diatomic molecules only form when two atoms of the same element are bonded together with no other element.Full Answer >
Electrons undergo motion due to the effect of electrical and magnetic fields, or thermal energy. The motion of electrons under the effects of thermal kinetic energy lends them thermal velocity, whereas the motion of electrons under the effects of electrical or magnetic fields lends them drift velocity.Full Answer >
Calcium belongs to the family of elements called the alkaline earth metals. It is placed in Period 4 and Group 2, or the S-block, of the Periodic Table of Elements. It is a soft grey metal with atomic number 20 and weighs 40.078 atomic mass units.Full Answer >