Polymeric molecules have a high molecular mass and are collections of many monomer units. As the stress created is not directly proportional to deformation, Hooke's law typically does not apply to polymers. Because polymers have low densities, their strength to mass ratio frequently rivals that of metals and ceramics.
Bio-materials must be compatible with the bodily tissues and non-toxic because they are implanted into living organisms to replace damaged portions. All of the aforementioned materials—metals, ceramics, polymers, and their mixtures—can be employed as biomaterials as long as these requirements are satisfied.
Both an element and a compound are regarded as pure forms of matter since different samples of the same element or compound will have the exact same makeup.
The molar mass of an element varies because different isotopes have different numbers of neutrons but the same number of protons. Additionally, it alters the p-n ratio, making one isotope more stable than the other. For instance, tritium is radioactive but protium is stable.
In general, ceramics have greater or equal toughness, yield strength, and hardness, but they are quite prone to plastic deformation. Any tension above their yield point causes fracture, no matter how slight.
Proton and neutron counts vary between isobars, while the overall amount of nucleons (protons and neutrons) is constant across all isobars. Isobars therefore share the same atomic weight.
Steels are regarded as iron alloys because they typically contain less than 6% carbon, making them metallic solids.
Atoms of several elements that have the same number of neutrons but differing atomic and mass numbers are said to be isotones. For instance, the isotones of boron-12 and carbon-12 both have 7 neutrons.
Any gas has an Avogadro number of atoms or molecules per gram-mole. As a result, one gram-mole of hydrogen gas and one gram-mole of helium gas, respectively, weigh two and three grams. 1g He equals 1/3 g-mol He and 1g H2 equals 1/2 g-mol H2. Helium therefore has the fewest atoms per gram.
Energy levels that are degenerate are equivalent. When there is no external magnetic field, the orbitals in the same subshell of an atom degenerate.
A second half plane of atoms in a lattice is all that is needed to represent the edge defect. Because there are so many defective sites generated within the lattice along a line, the dislocations are known as a line defect. This sort of defect adds an additional atomic plane inside the crystal.
1 amu is equal to 1/12 of the atomic mass of carbon, 1/16 of the atomic mass of oxygen, and 1/2 of the mass of hydrogen molecules (not molar).
The characteristic that sets apart atoms of one species from another is the atomic number, or the total number of protons. Hydrogen and helium, for instance, have atomic numbers of 1 and 2, respectively.
Mixed dislocations are those that have both screw and edge dislocation characteristics, with the line direction and burger vector being parallel in screw dislocation and perpendicular in edge dislocation, respectively. Burgers vector and line direction thereby form an angle that is neither perpendicular nor parallel.
Furnaces typically have ceramic linings because these materials, which mostly consist of oxides, carbides, and nitrides, can sustain extremely high temperatures.
Fiberglass, also known as glass fiber reinforced polymer (GFRP), is a lightweight, highly durable, and corrosion-resistant industrial material.
