What type of ion forms when an atom loses electrons

The right answer is positive ion.

Since the number of protons will be more than the number of electrons and since protons are positively charged, It'l be positively charged as well.  

Those atoms are mainly metals, Hydrogen and Carbon since they tend to lose electrons than gaining in ionic bonding because they have less than three electrons on their outermost energy shells.

the abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. the region occupied by the abdomen is termed the abdominal cavity. the stomach secretes acid and enzymes that digest food. ridges of muscle tissue called rugae line the stomach. the stomach muscles contract periodically, churning food to enhance digestion. the pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.