an anatomic structure with branches resembling a tree. bronchial tree the bronchi and their branching structures; see color plates. tracheobronchial tree the trachea, bronchi, and their branching structures; see color plates.. an anatomical structure with branches resembling a tree. 2. in information science, a decision tree. bronchial tree. the trachea, bronchi and successive branching generations of the respiratory passages.
If we make the balanced equation between al giving al2o3, The number of aluminum atoms is two and the number of oxygen atoms is three. As we know the atomic masses of aluminum as 26.9815386 grams per mole and oxygen as 16.9994 grams per mole. Multiplying the number of atoms of each of these elements by its respective atomic weight and then adding them, the molecular weight of Al2O3 is 101.961276 grams per mole.
Aluminum and Iron are elements, which means that every atom in a block of pure aluminum is an aluminum atom, and similarly for iron (there are no molecules with different kinds of atoms in them). All atoms of a certain element have the same number of protons.Aluminum has 13 protons in its nucleus and Iron has 26.Brass is an alloy. Alloys are created when two or more metals (or a metal and a nonmetal) are mixed and stirred together. You might compare it to putting cocoa in milk and stirring it.luminum and Iron are elements, which means that every atom in a block of pure aluminum is an aluminum atom, and similarly for iron (there are no molecules with different kinds of atoms in them). All atoms of a certain element have the same number of protons.