An atom is stable because of a balanced nucleus that does not contain excess energy. If the forces between the protons and the neutrons in the nucleus are unbalanced, then the atom is unstable. Stable atoms retain their form indefinitely, while unstable atoms undergo radioactive decay. Most naturally occurring atoms are stable and do not decay.
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- The atoms are defined as the smallest constituents of ordinary matter, which can be divided without the release of electrically charged particles. The atoms consist of two parts. An atomic nucleus and an electron cloud.
- Atom definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation.
An Atom Is Defined AsTake anything apart andyou'll find something smaller inside. There are engines inside cars,pips inside apples, hearts and lungs inside people, and stuffinginside teddy bears. But what happens if you keep going? If you keeptaking things apart, you'll eventually, find that all matter(all the 'stuff' that surrounds us) is made fromdifferent typesof atoms. Living things, for example, are mostly made from the atomscarbon, hydrogen, and oxygen. These are just three of over 100chemical elements that scientists havediscovered. Otherelements include metals such as copper, tin, iron andgold, and gaseslike hydrogen and helium. You can make virtually anything you canthink of by joining atoms of different elements together like tinyLEGO®blocks.
An Atom Is Electrically
Atoms are the building blocks of matter. Everything around us is made up of atoms. The atom is more than a million times smaller than the thickness of a human hair. The smallest speck that can be seen under an ordinary microscope contains more than 10 billion atoms. Even though atoms are incredibly tiny, they are made up of even more minute particles: protons, neutrons, and electrons. These are called subatomic particles. Each element has a definite number of subatomic particles, which make up the center of the atom, called the nucleus.
The proton, a subatomic particle that carries a positive charge, is made up of 3 quarks. The proton is one of few particles that are stable alone. Protons positive…show more content…
The other two fundamental forces, gravitation and the weak nuclear force, also affect the proton. Gravitation attracts things with mass to each other. The weak nuclear force is a feeble force that governs how some particles break up into other particles.
The neutron, which is an electrically neutral particle, is roughly the same mass of a proton. The neutron and proton are tightly bonded together in the nucleus of the atom. Each atom usually contains about as many neutrons as protons, but different atoms of the same element may have different numbers of neutrons. All four fundamental forces of nature also affect electrons. Because it has mass, it is affected by gravity. Although the neutron has no electrical charge, it is slightly magnetic, so it has an electromagnetic force. The neutron is also affected by the strong nuclear force and the weak nuclear force.
The electron, which forms the other layer of the atom, has a negative charge. The electron’s negative charge is –1.602 x 10^-19 coulomb, and has a mass of 9.109 x 10^-31 kg. The electrons are equal in number to the protons in the atom, balancing the electrical charge of the nucleus. The atom’s electrons orbit around the nucleus of the atom. The greater amount of energy the electron has, the further away from the nucleus it will be.
The subatomic particles work