What is an atom?

An atom is a basic substance. (A substance is any substance that can be physically touched.) Everything in the universe consists of atoms, since everything in the universe (except for energy) consists of substances.

The atom itself is composed of three small particles called subatomic particles. Proton, neutron, and electron. Protons and neutrons form the center of the atom called the nucleus, and electrons jump over the nucleus above the small cloud. Electrons are negatively charged, and protons are positively charged. At normal (neutral) atoms, the number of protons is equal to the number of electrons. Usually, it is not always, but the number of neutrons is the same.

Negative electrons are attracted to the positive nucleus with the same force, so that the magnets function. This is the reason that atoms are gathered.

An atom is defined by the number of protons and neutrons. The number of protons represents the number of atoms and determines which element is an atom. Neutron contributes to atomic stability and determines the number of isotopes. The most important stabilizing element found by humans is lead, and there is sufficient evidence that there are 82 protons. Due to the structural symmetry of the atoms, some isotopes of lead with different numbers of neutrons are stable for their "mysterious" number of protons. Normally, atoms with many protons and neutrons become asymmetric in atomic structure, become unstable and collapse into lighter elements. However, chemists have speculated that some of these very heavy elements may have stable isotopes

In order to understand what the radioisotope is, you must have a basic understanding of the atom. An atom is composed of three elementary particles: proton, neutron, and electron. A proton and a neutron combine to form a nucleus, and electrons are orbiting along orbits ... Further display ... In nuclear medicine diagnosis, a very small amount of radioactive substance is introduced into the body. Because medical isotopes are drawn to specific organs, bones, or tissues, the emissions they produce may provide important information on a particular type of cancer or disease. Information gathered during nuclear medicine technology is more comprehensive than other diagnostic imaging procedures to explain organ function as well as structure. As a result, we can diagnose many diseases and cancer early.

If the neutron number of each atom of the same element is different, each atom is called an isotope. When reading the Periodic Table, the listed atomic weights are the average atomic mass of all isotopes of that element found in nature. For example, the atomic weight of carbon in the periodic table is 12.01. Carbon can not have 6.01 neutron since it can not have part of neutrons. There are 6 neutrons on most carbon atoms, but this value is above 6, as we know that there are 7 neutrons and 8 neutrons. For our purposes we calculate the number of neutrons by rounding the atomic mass to the nearest integer.