Period

{
  "id": "MLC-T-CHM-008642",
  "term": "Period",
  "field": "Chemistry",
  "definition": "The time taken for one full cycle of a periodic phenomenon such as an oscillation or wave, equal to the reciprocal of its frequency and measured in seconds. In the periodic table the same word names a horizontal row of elements, of which there are seven, the first holding only hydrogen and helium.",
  "subject": "Physical and Biophysical Chemistry",
  "references": [
    "Green Book, 2nd ed., p. 11 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)",
    "PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 986 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/period/"
}