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.
Best Answer: a normal head of lettuce can weigh between 10oz, and 1 1/2 lbs. I should know I am addicted to lettuce. I eat it every single day. If you put three largish leaves, in your sandwhich the calorie content is small. A 1lb head of lettuce will have around 60 calories. So each leaf is around 5 calories. That is a normal sliced loaf size of bread. If it's a foot long, say at Subway, type thing, you have more lettuce- about five or sixe leaves, but they will be smaller leaves, so at most 30 calories.