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Atomic Numbers
The atomic number, as denoted on the periodic table, refers to the number of protons in a single atom of that particular element. Learn more about the organization of the periodic table with important facts from a science teacher in this free video on... More »
Difficulty: Moderate
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Atomic number - Wikipedia


In chemistry and physics, the atomic number of a chemical element is the number of protons found in the nucleus of an atom of that element, and therefore ...

Atomic number, atomic mass, and isotopes | Radiometric dating ...


Fundamental properties of atoms including atomic number and atomic mass. The atomic number is the number of protons in an atom, and isotopes have the ...

The Periodic Table of Elements - Elements Listed by Atomic Number


Elements Listed by Atomic Number ... How to calculate the number of protons, neutrons and electrons in an atom of an ... How to make a model of an atom.

Atomic Number and Mass Number - NDE/NDT Resource Center


Define and determine the atomic number of an atom. Define and ... The number of protons in the nucleus of an atom determines an element's atomic number.

Atomic number | Define Atomic number at Dictionary.com


Atomic number definition, the number of positive charges or protons in the nucleus of an atom of a given element, and therefore also the number of electrons ...

Chemical Elements.com - Atomic Number


An up-to-date periodic table with detailed but easy to understand information.

BBC - GCSE Bitesize: Atomic number and mass number


A secondary school revision resource for AQA GCSE Chemistry about atoms and elements, including atomic number, mass number, atomic structure and ...

WebElements Periodic Table»Atomic number»periodicity


The atomic number corresponds to the number of protons in the nucleus of an atom of that element. It also corresponds to the number of electrons in the neutral  ...

Atomic Number and Mass Number - Video & Lesson Transcript ...


Atoms are the basic building blocks of everything around you. In order to really understand how atoms combine to form molecules, it's necessary to...