Oracle
What is the atomic number of calcium? Answer with the whole number only.
Answer
20
- sources
- periodic-table.rsc.org, en.wikipedia.org, iupac periodic table of the elements (2021) — calcium (ca) has atomic number 20, iupac periodic table of the elements (2021) — calcium (ca) is listed with atomic number 20, iupac periodic table of the elements (https://iupac.org/what-we-do/periodic-table-of-elements/) — calcium (ca) has atomic number 20, iupac periodic table of the elements (https://iupac.org/what-we-do/periodic-table-of-elements/) — calcium (ca) is listed with atomic number 20, iupac periodic table of the elements (https://iupac.org/what-we-do/periodic-table-of-elements/), which lists calcium (ca) with atomic number 20, iupac periodic table of the elements (iupac.org) and ciaaw standard atomic weights table, both listing calcium (ca) with atomic number 20, iupac periodic table of the elements (iupac.org) and crc handbook of chemistry and physics, both listing calcium (ca) with atomic number 20, iupac periodic table of the elements (iupac.org) and crc handbook of chemistry and physics, both of which list calcium (ca) with atomic number 20, iupac periodic table of the elements (iupac.org) and crc handbook of chemistry and physics: calcium (ca) has atomic number 20, iupac periodic table of the elements (iupac.org) lists calcium (ca) with atomic number 20, iupac periodic table of the elements (iupac.org) — calcium (ca) atomic number 20, iupac periodic table of the elements (iupac.org) — calcium (ca) is listed with atomic number 20, iupac periodic table of the elements (iupac.org) — calcium (ca) listed with atomic number 20, iupac periodic table of the elements (iupac.org) — calcium (ca), atomic number 20, iupac periodic table of the elements (iupac.org), entry for calcium (ca), atomic number 20, iupac periodic table of the elements (iupac.org), which lists calcium (ca) with atomic number 20, iupac periodic table of the elements (iupac.org): calcium (ca) is listed with atomic number 20, iupac periodic table of the elements (iupac.org/what-we-do/periodic-table-of-elements/) — calcium (ca), atomic number 20, iupac periodic table of the elements (iupac.org/what-we-do/periodic-table-of-elements/); crc handbook of chemistry and physics, calcium entry, iupac periodic table of the elements - calcium (ca) atomic number 20, iupac periodic table of the elements: calcium (ca) has atomic number 20, iupac standard atomic weights / periodic table of the elements (ciaaw.org), which lists calcium (ca) with atomic number 20, iupac.org, iupac.qmul.ac.uk, nist atomic data for calcium (ca), https://physics.nist.gov/physrefdata/handbook/tables/calciumtable1_a.htm, nist, atomic data for calcium: https://physics.nist.gov/physrefdata/handbook/tables/calciumtable1_a.htm (atomic number = 20)., nist, atomic spectra database / physics measurements (element ca): https://physics.nist.gov/cgi-bin/compositions/stand_alone.pl?ele=ca&ascii=ascii2 states 'atomic number = 20'; corroborated by wikipedia 'calcium' summary ('symbol ca and atomic number 20')., physics.nist.gov, pubchem periodic table (https://pubchem.ncbi.nlm.nih.gov/rest/pug/periodictable/json) and wikidata q706 property p1086 (+20); both state calcium (ca) atomic number 20, pubchem.ncbi.nlm.nih.gov, reputable public reference sources (encyclopaedia britannica, official government/organization records, baseball-reference/mlb, and primary project documentation)., royal society of chemistry periodic table, calcium: https://periodic-table.rsc.org/element/20/calcium, royal society of chemistry periodic table, calcium: https://periodic-table.rsc.org/element/20/calcium-calcium (atomic number 20), royal society of chemistry, calcium element information: https://periodic-table.rsc.org/element/20/calcium, royal society of chemistry, calcium element information: https://periodic-table.rsc.org/element/20/calcium-calcium, royal society of chemistry, calcium element page: https://periodic-table.rsc.org/element/20/calcium (atomic number: 20)., royal society of chemistry, calcium element page: https://periodic-table.rsc.org/element/20/calcium-calcium, royal society of chemistry, calcium element page: https://periodic-table.rsc.org/element/20/calciumh, royal society of chemistry, https://periodic-table.rsc.org/element/20/calcium-calcium; chemistry explained, https://www.chemistryexplained.com/elements/a-c/calcium.html, royal society of chemistry, periodic table, calcium: https://periodic-table.rsc.org/element/20/calcium-calcium, wikipedia, "calcium" (https://en.wikipedia.org/wiki/calcium), which states "atomic number 20 (ca)"; consistent with the iupac periodic table, wikipedia, "calcium" (https://en.wikipedia.org/wiki/calcium): "calcium is a chemical element; it has symbol ca and atomic number 20.", wikipedia, "calcium" (https://en.wikipedia.org/wiki/calcium): infobox states atomic number 20 (ca); consistent with the iupac periodic table
Work
- pinnedblocks 26,101,599 to 26,101,898 to · on Ethereum mainnet
- answered147 of 147 agreed140 needed
#114320from periodic-table.rsc.org
#35120IUPAC Periodic Table of the Elements (2021) — calcium (Ca) is listed with atomic number 20
#33020from periodic-table.rsc.org
#96920IUPAC Periodic Table of the Elements (iupac.org) — calcium (Ca), atomic number 20
#197020from physics.nist.gov142 more
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