1 )most of these particles can be broken down into the fundamental subatomic particles, which are subatomic particles that cannot be broken down further. besides, protons, electrons, and neutrons, there are other subatomic particles, such as anti-particles, quarks, leptons, and neutrinos.
explanation:
2) the gravitational force between two objects is proportional to their masses and decreases rapidly as the distance between the masses increases. gravity is the weakest universal force, but it is the most effective force over long distances.
3)the nucleus of an atom is held together by the strong nuclear force that binds together protons and neutrons. although the strong nuclear force is the strongest of the four fundamental forces, it acts only over very short - typically nuclear - distances. it binds together the protons and neutrons in the nucleus.
4) photons do not experience the electromagnetic force themselves, and so they do not interact with each other, but the effects of electromagnetism are produced by the energy and momentum they carry. the photons that carry force are known as 'virtual' particles.
5) gravity is most accurately described by the general theory of relativity which describes gravity not as a force, but as a consequence of the curvature of space time caused by the uneven distribution of mass.
6) the four fundamental forces of nature are gravitational force, weak nuclear force, electromagnetic force and strong nuclear force. the weak and strong forces are effective only over a very short range and dominate only at the level of subatomic particles. gravity and electromagnetic force have infinite range.
7) elements are substances consisting of one type of atom, for example carbon atoms we now know that the atom is divisible, often releasing tremendous energies as isotopes, and , can be used to determine the diet of define the terms atomic number and atomic mass and be able to describe
8) in nuclear fusion, radioactive decay converts hydrogen into helium and powers the sun. the weak force is one of the four fundamental forces that govern all matter in the universe.
9) planets orbit the sun is related to why objects fall to earth when we drop them. the sun's gravity pulls on the planets, just as earth's gravity pulls down anything that is not held up by some other force and keeps you and on the ground.