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Atom and page ref

What is an Atom? The atom is considered the basic building block of matter. Anything that has a mass—in other words, anything that occupies space—is composed of atoms.

Given that these particles make up atoms, they are often referred to as subatomic particles. There are three subatomic particles: Two of the subatomic particles have electrical charges: A fundamental rule is that particles with the same charge are repulsed from each other, while particles with opposite charges are attracted to each other.

So, much like opposite ends of a magnet, protons and electrons are attracted to each other. Likewise, just as when you experience resistance trying to push the same ends of two magnets together, protons are repelled from other protons and electrons are repelled from other electrons.

The nucleus or center of an atom is made up of protons and neutrons. The number of protons in the nucleus, known as the "atomic number," primarily determines where that atom fits on the Periodic Table.

The number of protons in the nucleus also defines in large part the characteristics of an atom—is it a gas or a metal, for example. Two atoms with an identical number of protons in their nuclei belong to the same element. An element, like hydrogen, oxygen or iron, is a substance that cannot be broken down—outside of a nuclear reaction—into anything else.

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In other words, one element cannot be transformed into another again, with the exception of nuclear reactions. Now, while the protons are the same in an element, the number of neutrons may vary from atom to atom.

The number of neutrons determines what isotope an atom is. This is important to the NRC because the number of neutrons relative to the protons determines the stability of the nucleus, with certain isotopes undergoing radioactive decay.

While radioactive decay can occur in a variety of ways, it is, simply put, the process by which unstable atoms break down, releasing particles and energy.

Generally speaking, atoms with roughly matching numbers of protons and neutrons are more stable against decay. Given how important it is to the work of the NRC, the concept of radioactive decay will be taken up as part of a future blog post. The nucleus of an atom is surrounded by a cloud of electrons.

Remember, electrons are negatively-charged and are attracted to the positively-charged protons in the nucleus. An atom is considered to be electrically neutral if it has an equal number of protons and electrons. If an atom has a different number of electrons and protons, it is called an ion.

An important principle to know is electrons may be transferred from one atom to another or even shared between atoms allowing atoms to bind together. These bonds allow for the formation of molecules, combinations of atoms including those of different elements.

Just as several atoms make up a molecule, many molecules make up a chemical. Nuclear Regulatory Commission is an independent federal government agency responsible for regulating the commercial use of nuclear materials.

This document is free of copyright and can be reproduced for educational purposes.An example of an atom is a single particle of any element on the periodic table. Carbon, for instance, consists solely of identical carbon atoms. Atoms are the smallest distinct unit of matter, and they cannot be broken down by chemical means.

An atom consists of electrons that orbit a nucleus. What is Atom? Atom is the only movie ticketing app and website that gives you a VIP experience from start to finish. Buy movie tickets online or with our app, invite friends and skip the lines at the movie theater with your digital ticket.

What is Atom? Atom is the only movie ticketing app and website that gives you a VIP experience from start to finish. Buy movie tickets online or with our app, invite friends and skip the lines at the movie theater with your digital ticket.

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NRC: The Student Corner: What is an atom ?

To find your Association Registration Login, please see the Site Menu. In one compound the -SCN ligand is bonded to the metal atom via the N atom and in the other it is bonded via the S atom.

These two compounds are examples of _____ isomers. Answer: 1 Page Ref: Sec. True/False Questions 1) If chloride is a ligand to a transition metal it will not be precipitated by silver nitrate.

Atom and page ref

Answer: %(15). An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small; typical sizes are around

What Are Examples of Atoms? |