Use our easy to read table to find how many calories in bread and bread products, such as white bread, hamburger buns, pita bread and mountain bread calories per slice. When counting calories you need to know how many calories or kilojoules are in everything you eat. As bread is one of the staples of life, calories contained in bread make up a large percentage of your calorie intake. Therefore knowing the amount of calories or kj per slice is an important step to controlling weight.
A model of a water molecule. The definition of a molecule is the smallest amount of something, particularly of a chemical substance, that can exist on its own. An example of a molecule are two atoms of hydrogen. molecule. molecule.
Molecules. A molecule is two or more atoms bonded together chemically. An atom is the most basic unit of matter. When atoms are chemically bonded together with covalent bonds, molecules are formed. Molecules can be very small like water molecules or extremely large like proteins such as hemoglobin. Upon examination of a chemical formula for a molecule we see the element symbols marked with a subscripted number. The number represents the amount of that atom present within the molecule. If we are looking at water which has a chemical formula of H 2 O, this refers to 2 atoms of hydrogen bonded to one atom of oxygen.