Nuclear reactions that result in compound nucleus formation are referred to as direct reactions. Direct reactions involve a two-step process of formation and evaporation. During the formation step, the incident projectile merges with the target nucleus such that the total excitation energy (i.e., ...
Atoms are made up of a nucleus, protons and electrons. Atoms are the basic units of matter and the defining structure of elements. The term "atom" comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be ...
The protons of an atom are all crammed together inside the nucleus. Each proton carries a positive charge, and like charges repel each other. However, forces in the nucleus counteract this repulsion and hold the nucleus together. (Physicists call these forces nuclear glue. But sometimes this “...
according to the rules of electricity. Some atomic nuclei are unstable because the binding force varies for different atoms based on the size of the nucleus. These
How does an atomic nucleus compare to an atom as a whole? Atom: Our understanding of the atom evolved over many generations. The most significant and earliest contribution was by John Dalton and although his intuition was impressive, the idea was wrapped in many misconceptions. In fact, a...
An atom of ordinary carbon, called carbon-12, has six protons (质子)and six neutrons (中子)in its nucleus(原子核). Carbon-14,or C-14,is a radioactive,unstable form of carbon that has two extra neutrons. It returns to a more stable form of carbon through a process called decay(衰减)...
a high-energy photon comes into the near vicinity of the nucleus of an atom and has a coulombic interaction in which the photon disappears and two charged particles are produced in its place. These charged particles, apositronand an electron, share (as kinetic energy) any available energy of...
It can also bond with up to four other atoms because of its electron arrangement. Atoms are arranged as a nucleus surrounded by an electron cloud, with electrons zinging around at different distances from the nucleus. Chemists conceive of these distances as shells, and define the properties of ...
Atoms: Atoms are the purest form of matter. They consist of protons, neutrons, and electrons. The periodic table lists all of the different types of atoms that are known to exist and are known as elements. Answer and Explanation: Become a Study.com member to unlock this answer!Create your...
Atom is the smallest particle of an element. Atoms cannot be divided into anything smaller. What is an atom made of? Three subatomic particles: – Proton – Neutron – electron + PROTONS + Positively charged subatomic particle Found in the nucleus of an atom – Center of the atom Each proto...