• Atomic number - Wikipedia

    en.wikipedia.org/wiki/Atomic_number The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.
  • What Is the Atomic Number? Definition and Importance

    www.thoughtco.com/what-is-the-atomic-number-4031221 The atomic number of carbon is 6. More commonly, the isotope symbol already tells you the atomic number. For example, if the symbol is written as 14 6 C, the number "6" is listed. The atomic number is the smaller of the two numbers in the symbol. It is typically located as a subscript to the left of the element symbol.
  • Atomic number - definition of atomic number by The Free ...

    www.thefreedictionary.com/atomic+number Define atomic number. atomic number synonyms, atomic number pronunciation, atomic number translation, English dictionary definition of atomic number. n. Symbol Z Abbr. at. no. The number of protons in an atomic nucleus. n the number of protons in the nucleus of an atom of an element. Abbreviation: at.
  • Atomic number | Definition of Atomic number at Dictionary.com

    www.dictionary.com/browse/atomic-number 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 normally surrounding the nucleus. Abbreviation: at. no.; Symbol: Z See more.
  • Atomic Number | Definition of Atomic Number by Merriam-Webster

    www.merriam-webster.com/dictionary/atomic%20number Atomic number definition is - an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of the element in the periodic table.
  • atomic number | Definition & Facts | Britannica

    www.britannica.com/science/atomic-number Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in a neutral atom, is also the atomic number.
  • Element List - Atomic Number, Element Name and Symbol

    www.thoughtco.com/element-list-names-atomic-numbers-606529 Here's a list of the chemical elements ordered by increasing atomic number.The names and element symbols are provided. Each element has a one- or two-letter symbol, which is an abbreviated form of its present or former name.The element number is its atomic number, which is the number of protons in each of its atoms.
  • List of chemical elements - Wikipedia

    en.wikipedia.org/wiki/List_of_elements_by_atomic_number This is a list of the 118 chemical elements which have been identified as of 2019. A chemical element, often simply called an element, is a species of atoms which all have the same number of protons in their atomic nuclei (i.e., the same atomic number, or Z).. Perhaps the most popular visualization of all 118 elements is the periodic table of the elements, a convenient tabular arrangement of ...
  • Atomic number, atomic mass, and isotopes (article) | Khan ...

    www.khanacademy.org/science/.../atomic-number-atomic-mass-and-isotopes-article 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 same atomic number but differ in the number of neutrons.
  • Atomic number, mass number, and isotopes (video) | Khan ...

    www.khanacademy.org/science/chemistry/.../atomic-number-mass-number-and-isotopes So the atomic number is symbolized by Z and it refers to the number of protons in a nucleus. And you can find the atomic number on the periodic table. So we're going to talk about hydrogen in this video. So for hydrogen, hydrogen's atomic number is one. So it's right here, so there's one proton in ...