terms in the nuclear

A

• Accelerator: A tool that can accelerate the rate of a charged particle or ion to reach very high speeds approaching the speed of light.

• Actinides: elements that have a proton number of 89 or more and have a similar chemical sifar element actinium. All actinides are radioactive elements and generally has a half-length and transmitter alpha

• Activity: number of decays per unit time in a radioactive element. Units of activity expressed in Becquerel (Bq) which is one decay per second.

• Alpha (particle): alpha particles: positively charged particles emitted during the radioactive decay. Alpha particle consists of two protons and two neutrons (helium-4 nuclei (He-4)). Despite generally high energy, but the particle alpah have weak penetrating power. Its reach in the air only reaches a few centimeters and can be stopped easily by a sheet of paper or the outermost layer of skin.

• Atom: atom: author element particles that can not be described again. Atom has a nucleus consisting of positively charged protons and neutrons are not charged and have the same mass. Neutral atoms have the number of protons and electrons the same.

• Atomic mass unit (Amu): mass units of 1 / 12 of an atomic mass of carbon-12 (C-12). Roughly equivalent to the mass of a single proton or neutron. One atomic mass unit = 1.6605 x 10-27 kg, the mass of electron = 0.00055 Amu, Amu mass of proton = 1.00727; mass of neutron = 1.00866 Amu.

• Atomic number (Z): atomic number (Z): the number of protons in the nucleus, also showed the position of the element in the periodic table.