Yes, MOST matter is extremely stable. There are exceptions however, the most obvious of which is uranium (there are plenty of other unstable elements (elements with an extremely short half-life), but uranium has become popularized because it is one of the most unstable). Matter that is particularly unstable is used in nuclear reactions, because it is much easier to split than stable matter. For example, although there is enough matter in a piece of chalk that if transformed into pure energy would level a city, the atoms are so stable that it is seemingly impossible to release this energy.
Photon matter is a form of energy, not a physical substance.
Heat is not a form of matter: it is a form of energy. Of course, Einstein famously proved the equivalence of matter and energy.
Hydrazine is a form of matter, not energy.
matter is something you can see or touch energy is not.
Kinetic energy is the form of energy that moves particles of matter. It is the energy associated with the motion of an object.
Fire is a form of energy, not matter. It results from the rapid oxidation of a material, releasing heat and light energy.
When two atoms form a covalent bond, potential energy is converted into a more stable form of energy known as bond energy. This process releases energy, making the system more stable.
None, energy cannot be made or destroyed. It can only change form. The energy you would get from any organic matter is already in the matter. The energy is not being "made". It is just changing form. All matter is just energy.
No. Light is a form of energy.
No, air, heat energy, and sound are not forms of matter. Air is a mixture of gases, heat energy is a form of energy, and sound is a type of mechanical wave. Matter refers to anything that has mass and occupies space.
No, an X-ray is not a form of matter. It is electromagnetic energy.
The revolution of the electron in a circular orbit is not expected to be stable. any particle in a circular orbit would undergo acceleration. During acceleration, charged particles would radiate energy. thus, the revolving electron would lose energy and finally fall into the nucleus. If this were so, the atom should be highly unstable and hence matter would not exist in the form that we know. We know that atoms are quite stable.