Ionic bond, also known as electrovalent bond is a type of bond formed from the electrostatic attraction between oppositely charged ions in a chemical compound. These kinds of bonds occur mainly between a metallic and a non metallic atom.
What is food irradiation? Food irradiation is a processing technique that exposes food to electron beams, X-rays or gamma rays. The process produces a similar effect to pasteurisation, cooking or other forms of heat treatment, but with less effect on look and texture. Irradiated food has been exposed to radioactivity but does not become radioactive itself.
Fatty fish like salmon, tuna and mackerel also contain vitamin D as do beef liver, cheese and eggs, although in much smaller amounts. When it comes to sun exposure, most people only need five to 30 minutes of exposure to the sun twice a week. This can be on the face, arms, back or legs.