en.wikipedia.org/wiki/Atomic_numberThe 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.
www.britannica.com/science/atomic-numberAtomic 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.
www.thefreedictionary.com/atomic+numberDefine 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.
www.thoughtco.com/what-is-the-atomic-number-4031221The 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.
www.dictionary.com/browse/atomic-numberAtomic 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.
www.khanacademy.org/science/.../atomic-number-atomic-mass-and-isotopes-articleFundamental 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.
www.nde-ed.org/EducationResources/HighSchool/.../atomicmassnumber.htmATOMIC NUMBER AND MASS NUMBERS. After reading this section you will be able to do the following: Define and determine the atomic number of an atom. Define and determine the mass number of an atom. What is an atom's atomic number? The number of protons in the nucleus of an atom determines an element's atomic number.
www.thoughtco.com/element-list-names-atomic-numbers-606529Here'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.
www.wisegeek.com/what-is-an-atomic-number.htmThe atomic number is the number of protons — positively charged particles — in the nucleus an atom of a chemical element. Elements are distinguished from one another by the numbers of these particles they have, and so each element has its own unique atomic number.