When metals are next to each other, the valence electrons don't just stay on their own atom; they roam around the whole metal complex. They float free as though floating through a sea of electrons, much like an individual water molecule floats free in the sea. This is why it is called the electron sea model. Each metal atom allows its electrons to roam freely, so these atoms become positively charged cations. These cations are kind of like a positively charged island and are surrounded by a sea of negatively charged electrons. It looks a bit like this:
Nausea and vomiting are NOT diseases in and of themselves. They are symptoms of other conditions. For example, they can be a symptom of stomach flu, food poisoning, motion sickness, overeating, blocked intestine, illness, concussion or brain injury, appendicitis, inner ear conditions, and migraines.
Problems with nausea and vomiting are related to the cause. Nausea and vomiting from motion sickness, seasickness, food poisoning, or cancer therapy can result in loss of water and electrolytes, which can lead to dehydration. Vomiting and nausea known as morning sickness may occur during pregnancy.1  Nausea is an unpleasant, queasy feeling in the throat or stomach that may result in vomiting. 2  Vomiting is emptying the stomach as a result of strong gagging and retching that leads to throwing up.he following are common causes of nausea and vomiting: 1  Side effects of anesthesia used for surgery. 2  Stomach problems such as blockage (pyloric obstruction, a condition that causes forceful spitting up in infants). 3  Bleeding into the stomach from different causes. 4  Infection, irritation, or blockage of the intestines.