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The Electron The electron is a negatively charged particle that spins around the outside of the nucleus. Electrons spin so fast around the nucleus, scientists can never be 100% sure where they are located, but scientists can make estimates of where electrons should be.
Atoms always have the same number of electrons, protons, and neutrons. The positive electrical charge of the protons attracts the electrons to it. Atoms bond with each other to make molecules.
An atom is the smallest unit of an element, and each chemical element has a unique atomic number. For instance, hydrogen has an atomic number of 1 because every hydrogen atom has one proton in its nucleus. No other element has an atomic number of 1. Two other related properties of atoms are the mass number and the atomic weight.
Every atom has a PROTON and an ELECTRON. Not every atom has a NEUTRON. Hydrogen is the ONLY ATOM that has no neutron. All the others do. These are the three particles of atoms: PROTONS, NEUTRONS, ELECTRONS. Protons and neutrons are in the NUCLEUS. Electrons orbit around the nucleus in SHELLS.
Electrons are the lightest charged particles in nature: each has a mass of only about 9.1 × 10 −28 gram. Protons and neutrons are about 1,836 times more massive. In fact, the nucleus accounts for 99.9 percent of the atom’s mass, though it takes up a very small fraction of the atom’s size.
8 gru 2018 · Electrons are subatomic particles. Atoms are made of protons, neutrons, and electrons. Of these three particles, the electron has the smallest mass. Here is the definition of the electron, along with its word origin, history, and interesting facts. Electron Definition. An electron is a stable subatomic particle with a negative electrical charge ...
What is the atomic mass? What is an isotope? -The quantity of matter that makes up an atom. The total mass of the protons, neutrons and electrons that make up an atom. It is the average mass of an element’s naturally occurring isotopes, taking into account the percentage of occurrence on Earth of each isotope.-There can be more than one
