Curium is a hard, brittle, radioactive silvery metal. It does not occur in nature and must be made in a nuclear reactor by neutron capture reactions from plutonium and americium isotopes. It tarnishes slowly in dry air at room temperature.
Romaine lettuce is a rich source of fiber and has very few calories, only 8 in a one-cup serving. In terms of vitamins, a cup of Romaine lettuce delivers more than 50% of your daily requirement for vitamin A, as well as significant levels of vitamin K and vitamin C.
A ham sandwich made with two slices of whole wheat bread, two slices of ham and one leaf of iceberg lettuce contains 220 calories. It has 17 grams of protein, 25 grams of total carbohydrates and 6 grams of total fat, 2 grams of which are saturated fat -- 8 percent of the maximum daily value for a healthy adult on a 2,000-calorie diet.