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  Encyclopedia of Keywords > Nature > Chemistry > Atomic Number   Michael Charnine

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  1. The atomic number is the number of protons that is equal to the number of electrons. (Web site)
  2. The atomic number is a term used in chemistry and physics to represent the number of protons found in the nucleus of an atom.

Transactinide Elements

  1. Lists of the elements by name, by symbol, and by atomic number are also available. (Web site)
  2. All transactinide elements are also transuranium elements, that is, have an atomic number greater than that of uranium (92), an actinide.
  3. Super-heavy atoms are the transactinide elements beginning with rutherfordium (atomic number 104). (Web site)

Atomic Numbers

  1. Each particle taking part in the reaction is written with its chemical symbol, then atomic number subscripted, and atomic mass superscripted. (Web site)
  2. Magnesium has the symbol Mg, the atomic number 12, and an atomic mass of 24.31. (Web site)
  3. Other isotopes are referred by the element name, which gives the atomic number, and a number giving the atomic mass. (Web site)

Product Nucleus

  1. When the product nucleus is metastable, this is indicated by placing an asterisk ("*") next to its atomic number.
  2. Generally, the product nucleus has a different atomic number, and thus the configuration of its electron shell s is wrong.

But Different

  1. One of two or more atoms having the same atomic number but different mass numbers. (Web site)
  2. All of the atoms of a particular element have the same atomic number, but can have different numbers of neutrons.

Chemical Element

  1. A transuranium element is a chemical element with an atomic number that is greater than 92.
  2. A table of chemical elements ordered by atomic number and color coded according to type of element.
  3. A chemical element, symbol Lr, atomic number 103. (Web site)

Periodic Table

  1. Nobelium, also known as unnilbium, is a synthetic element in the periodic table that has the symbol No and atomic number 102.
  2. Isotope Radium emanation 222 Rn Radon is a chemical element in the periodic table that has the symbol Rn and atomic number 86.
  3. Technetium, atomic number 43 Promethium Promethium is a chemical element in the periodic table that has the symbol Pm and atomic number 61.

Each Element

  1. Under this approximation, any element with an atomic number of greater than 137 would require 1s electrons to be traveling faster than c, the speed of light.
  2. A nucleus with atomic number Z contains Z protons; therefore the number of protons is what distinguishes the different chemical elements.
  3. In 1913, Henry Moseley introduced the concept of the atomic number and explained the periodic law in terms of the number of protons each element has. (Web site)
  4. Given is each element's element symbol, atomic number, atomic mass or most stable isotope, and group and period numbers on the periodic table.

Same Element

  1. The various kinds of atoms are listed in the periodic table in order of increasing atomic number.
  2. Argon has atomic number 18 and is the third element in group 18 of the periodic table (noble gases). (Web site)
  3. Different isotopes of the same element have the same atomic number. (Web site)
  4. Elements with a low atomic number, such as aluminum, are used in shields to block beta radiation.

Mass Number

  1. To make the sums correct, the second nucleus to the right must have atomic number 2 and mass number 4; it is therefore also Helium-4.
  2. Here 1 n 0 depicts a neutron, E is the energy released, superscripts are the mass numbers and the subscripts refer to the atomic number (number of protons).

Unsynthesized Chemical

  1. Untrioctium is an unsynthesized chemical element with atomic number 138 and symbol Uto.
  2. Untriseptium is an unsynthesized chemical element with atomic number 137 and symbol Uts. (Web site)
  3. Untrihexium is an unsynthesized chemical element with atomic number 136 and symbol Uth.

Atomic Weight

  1. A nucleus with charge (atomic number) Z and atomic weight A is represented as ( A, Z).
  2. By rearranging the periodic table according to atomic number rather than atomic weight, a more systematic arrangement was obtained. (Web site)


  1. The result of the emission is a new element with a lower atomic number.
  2. Beta decay either increases or decreases the atomic number of the nucleus by one.
  3. The atomic number corresponds to the number of protons in an atom. (Web site)
  4. Finally, in elements heavier than xenon, there is a decrease in binding energy per nucleon as atomic number increases.
  5. He thus suggested that the hydrogen nucleus, which was known to have an atomic number of 1, was an elementary particle. (Web site)


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  Originally created: March 19, 2008.
  Links checked: March 19, 2013.
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