Protons, neutrons and electrons
electron
The atom is made up of several subatomic particles.The atom is made up of several subatomic particles.The atom is made up of several subatomic particles.The atom is made up of several subatomic particles.
When there is an electrical current, there is a movement of some charged particle. This may be any kind of particle - an electron (negative), a hole (positive), an ion (positive or negative), or some other particle.
An atom of an element or a molecule of a compound.
The smallest whole bit of matter for elements is an atom, for compounds is a molecule, and for mixtures is a particle.
Electrons do not make up the nucleus of an atom. They orbit the nucleus at various energy levels.
A substance that is composed of only one kind of matter is called an element. The smallest particle of an element is called an atom.
It is very unusual for one kind of atom to become another kind atom, however it does happen in radioactive processes. Every element is characterized by a distinct number of protons. For example, all hydrogen atoms have 1 proton, all helium atoms have 2 protons, etc. Atoms also include electrons and neutrons. However, adding or removing electrons or neutrons does not change the kind of atom. For example, a helium atom with 2 electrons or 1 electron is still a helium atom. Alpha decay is an example of a radioactive process in which the number of protons changes (and therefore the kind of atom changes). An alpha particle includes 2 protons and 2 neutrons. When it is expelled from an atom, a new kind atom is formed. This occurs when a uranium atom (92 protons) is changed into a thorium atom (90 protons) + an alpha particle.
Alpha decay is a kind of radioactive decay in which an alpha particle is emitted from an atom. An alpha particle consists of two protons and two neutrons. Therefore, when an atom of an element undergoes alpha decay, it loses two protons, which changes the atom from one element to another. This is because each different element is identified by the number of protons in its atomic nuclei.
An atom is a particle the smallest of an element. An element is a substance made up of many atoms of ONE kind (or molecules consisting of two or more identic atoms)
Alpha decay is a kind of radioactive decay in which an alpha particle is emitted from an atom. An alpha particle consists of two protons and two neutrons. Therefore, when an atom of an element undergoes alpha decay, it loses two protons, which changes the atom from one element to another. This is because each different element is identified by the number of protons in its atomic nuclei.
The proton and the neutron make up the nucleus, as the electron orbits the nucleus in the electron cloud.