ପରମାଣୁ କ୍ରମାଙ୍କ

ରସାୟନ ବିଜ୍ଞାନ ଓ ପଦାର୍ଥ ବିଜ୍ଞାନରେ ପରମାଣୁ କ୍ରମାଙ୍କ (ବା ପ୍ରୋଟୋନ କ୍ରମାଙ୍କ) ହେଉଛି ପରମାଣୁ ନ୍ୟଷ୍ଠୀ ବା ନ୍ୟୁକ୍ଳିଅସରେ ମିଳୁଥିବା ପ୍ରୋଟୋନ ସଂଖ୍ୟା । ଏଣୁ ଏହି ସଂଖ୍ୟା ମୌଳିକର ଚାର୍ଜ ସହ ସମାନୁପାତୀ ।

An explanation of the superscripts and subscripts seen in atomic number notation. Atomic number is the number of protons, and therefore also the total positive charge, in the atomic nucleus.

The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion (Z > 1). In this model it is an essential feature that the photon energy (or frequency) of the electromagnetic radiation emitted (shown) when an electron jumps from one orbital to another, be proportional to the mathematical square of atomic charge (Z²). Experimental measurement by Henry Moseley of this radiation for many elements (from Z = 13 to 92) showed the results as predicted by Bohr. Both the concept of atomic number and the Bohr model were thereby given scientific credence.

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