Calcium Elemental Symbol

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Calcium Calcium Calcio Cálcio Calcio Kalcium

Calcium(Ca) atomic and molecular weight, atomic number and elemental symbolCalcium is a Block S, Group 2, Period 4 element. Elemental CalciumThe number of electrons in each of Calcium's shells is 2, 8, 8, 2 and its electron configuration is [Ar] 4s2. Calcium Bohr Model The calcium atom has a radius of and its Van der Waals radius is In its elemental form, CAS 7440-70-2, calcium has a dull gray-silver appearance. Calcium is a reactive, soft metal that is a member of the alkaline earth elements. It is found in the minerals dolomite, gypsum, plagioclases, amphiboles, pyroxenes and garnets. Calcium was discovered and first isolated by Sir Humphrey Davy in 1808. The name calcium originates from the Latin word 'calics' meaning lime.

Calcium's primary commercial application is as a reducing agent in the production of other metals. In iron and steel production it is added to the melt to remove oxygen, sulfur and carbon. Calcium is also used in small doses in alloys of copper and beryllium. Various calcium compounds have wide application in food, pharmaceutical and cosmetics. It is also used in dietary supplements because it has been shown to improve bone and dental health. High Purity (99.999%) Calcium (Ca)Sputtering TargetCalcium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity). Elemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. High Purity (99.999%) Calcium Oxide (CaO) PowderCalcium nanoparticles and nanopowders provide ultra-high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits. Oxides are available in powder and dense pellet form for such uses as optical coating and thin film applications. Oxides tend to be insoluble. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Calcium is also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.

Calcium is non-toxic and is an essential metal for living organisms. Safety data for Calcium and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the Products tab below.

  • Properties
  • Safety Data
  • Products
  • Research
  • Isotopes
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Calcium Properties

Symbol: Ca Melting Point: 842 oC, 1547.6 oF, 1115.15 K
Atomic Number: 20 Boiling Point: 1484 oC, 2703.2 oF, 1757.15 K
Atomic Weight: 40.08 Density: 1.55 gm/cc
Element Category: alkaline earth metal Liquid Density @ Melting Point: 1.378 g·cm−3
Group, Period, Block: 2, 4, s Specific Heat: 0.156 Cal/g/K @ 25°C
    Heat of Vaporization 150.6 kJ mol-1
CHEMICAL STRUCTURE Heat of Fusion 9.33 kJ mol-1
Electrons: 20 Thermal Conductivity: 2.01 W/cm/K @ 298.2 K
Protons: 20 Thermal Expansion: (25 °C) 22.3 µm·m−1·K−1
Neutrons: 20 Electrical Resistivity: 3.91 microhm-cm @ 0 °C
Electron Configuration: [Ar]4s2 Electronegativity: 1.0 Paulings
Atomic Radius: 197 pm Tensile Strength: N/A
Covalent Radius: 176±10 pm Molar Heat Capacity: 25.929 J·mol−1·K−1
Van der Waals radius: 231 pm Young's Modulus: 20 GPa
Oxidation States: 2, 1 (strongly basic oxide) Shear Modulus: 7.4 GPa
Phase: Solid Bulk Modulus: 17 GPa
Crystal Structure: face-centered cubic Poisson Ratio: 0.31
Magnetic Ordering: diamagnetic Mohs Hardness: 1.75
1st Ionization Energy: 589.83 kJ mol-1 Vickers Hardness: N/A
2nd Ionization Energy: 1145.46 kJ mol-1 Brinell Hardness: 167 MPa
3rd Ionization Energy: 4912.40 kJ mol-1 Speed of Sound: (20 °C) 3810 m·s−1
CAS Number: 7440-70-2 Abundance in typical human body, by weight: 14000000 ppb
ChemSpider ID: 4573905 Abundance in typical human body, by atom: 2200000 ppb
PubChem CID: 5460341 Abundance in universe, by weight: 70000 ppb
MDL Number: MFCD00085314 Abundance in universe, by atom: 2000 ppb
EC Number: 231-179-5 Discovered By: Humphry Davy
Beilstein Number: 4241647 Discovery Date: 1808
SMILES Identifier: [CaH2]  
InChI Identifier: InChI=1S/Ca Other Names: Cálcio, Kalcium

Calcium Products

Metal Forms  •  Compounds  •  Alloys  •  Oxide Forms  •  Organometallic Compounds
Sputtering Targets  •  Nanomaterials  •  Semiconductor Materials •  Isotopes


Aluminum Calcium Sodium Silicate
Barium Calcium Tungsten Oxide
Bismuth Lead Strontium Calcium Copper Oxide
Bismuth Strontium Calcium Copper Oxide
Calcia Stabilized Zirconia
Calcium Acetate
Calcium Acetate Hydrate
Calcium Acetate Monohydrate
Calcium Acetate Solution
Calcium Aluminate
Calcium Arsenate
Calcium Boride
Calcium Borohydride
Calcium Borohydride/Magnesium Hydride
Calcium Bromate
Calcium Bromide
Calcium Bromide, Ultra Dry
Calcium Carbide
Calcium Carbonate
Calcium Cerium Fluoride
Calcium Chloride
Calcium Chloride Dihydrate
Calcium Chloride Hexahydrate
Calcium Chloride Pearl
Calcium Chloride Powder
Calcium Chloride Solution
Calcium Chloride, Ultra Dry
Calcium Chromate
Calcium Cobalt Oxide
Calcium Copper Titanate
Calcium Cyanamide
Calcium Ferrite
Calcium Fluoride
Calcium Fluoride, activated by Europium
Calcium Fluoride, Ultra Dry
Calcium Fluoride Window
Calcium Fluorophosphate Dihydrate
Calcium Fluorosilicate
Calcium Hydride
Calcium Hydroxide
Calcium Hypochlorite
Calcium Iodate
Calcium Iodate Monohydrate
Calcium Iodide
Calcium Iodide, Ultra Dry
Calcium Iodide Hydrate
Calcium Lanthanum Chromite
Calcium Metaborate
Calcium Metasilicate
Calcium Molybdenum Oxide
Calcium Molybdate
Calcium Nitrate
Calcium Nitrate Hydrate
Calcium Nitrate Solution
Calcium Nitrate Tetrahydrate
Calcium Nitride
Calcium Oxide
Calcium Perchlorate Tetrahydrate
Calcium Peroxide
Calcium Perrhenate
Calcium Phosphate
Calcium Phosphate Dibasic Anhydrous
Calcium Phosphate Dibasic Dihydrate
Calcium Phosphate Monobasic Monohydrate
Calcium Phosphate Tribasic
Calcium Pyrophosphate
Calcium Selenate
Calcium Selenite
Calcium Silicate
Calcium Silicate Bar
Calcium Silicate Board
Calcium Silicate Rod
Calcium Silicate Sheet
Calcium Silicide CaSi
Calcium Silicide CaSi2
Calcium Sulfate
Calcium Sulfate Dihydrate
Calcium Sulfate Solution
Calcium Sulfite
Calcium Tellurate
Calcium Tetrafluoroborate Hydrate
Calcium Thiocyanate Tetrahydrate
Calcium Titanate
Calcium Tungstate
Calcium Vanadate
Calcium Zirconate
Doped Lanthanum Chromite Paste
Lanthanum Calcium Manganite (LCM)
Neodymium Calcium Aluminate

Crystal/ Semiconductor Materials

Calcium Arsenide
Calcium Fluoride Beam Splitters
Calcium Fluoride Raman Substrates
Calcium Lanthanum Sulfide
Calcium Naphthenate
Calcium Phosphide
Calcium Selenide
Calcium Sulfide
Calcium Telluride


Calcium Carbonate Microparticles
Calcium Carbonate Nanoparticles
Calcium Chloride Nanoparticles
Calcium Nanofoil
Calcium Nanoprisms
Calcium Oxide Nanopowder
Calcium Phosphate Nanoparticles
Calcium Titanate Nanopowder
Calcium Zirconate Nanopowder
Cerium Oxide, Calcium doped Nanopowder
Hydroxyapatite Nanopowder


Calcium 40 Carbonate Isotope
Calcium 42 Carbonate Isotope
Calcium 43 Carbonate Isotope
Calcium 44 Carbonate Isotope
Calcium 46 Carbonate Isotope


Aluminum Calcium Alloy
Calcium Aluminum Alloy
Calcium Magnesium Alloy
Calcium Silicon Alloy

Organometallic Compounds

Calcium 2-Ethylhexanoate
Calcium 2-Methoxyethoxide
Calcium Abietate
Calcium Acetylacetonate
Calcium Benzoate
Calcium Benzoate Hydrate
Calcium Bis(2,2,6,6-tetramethyl-3,5-heptanedionate)
Calcium Borohydride bis(tetrahydrofuran)
Calcium Citrate
Calcium Citrate Malate
Calcium Citrate Tetrahydrate
Calcium D-Gluconate
Calcium D-Gluconate Monohydrate
Calcium D-Saccharate Tetrahydrate
Calcium Dodecylbenzene Sulfonate
Calcium Ethoxide
Calcium Formate
Calcium Fumarate
Calcium Gluceptate
Calcium Gluconate Monohydrate
Calcium Glycerophosphate
Calcium Glycerophosphate Hydrate
Calcium Isopropoxide
Calcium L-threonate
Calcium Lactate Pentahydrate
Calcium Lactate Hydrate
Calcium Lactate Anhydrous
Calcium Lactobionate
Calcium Malate
Calcium Methoxide
Calcium Octoate
Calcium Oxalate
Calcium Oxalate Hydrate
Calcium Oxalate Monohydrate
Calcium Pantothenate
Calcium Propionate
Calcium Resinate
Calcium Stannate
Calcium Stearate
Calcium Succinate Monohydrate
Calcium Trifluoromethanesulfonate
Calcium Trifluoromethanesulfonimide

Recent Research & Development for Calcium

  • A mini review of biodegradable calcium phosphate nanoparticles for gene delivery. Xie Y, Chen Y, Sun M, Ping Q. Curr Pharm Biotechnol. 2014 Nov.
  • Combination peel with incorporated fractional prickle coral calcium for the treatment of keratosis pilaris: a pilot study. Park KY, Son IP, Choi SY, Seo SJ, Hong CK. J Dermatolog Treat. 2014 Aug.
  • Monitoring intracellular calcium in response to GPCR activation using thin-film silicon photodiodes with integrated fluorescence filters. Biosens Bioelectron. 2014 create date:2013/09/24 | first author:Martins SA
  • Bioavailability of vitamin D(2) and calcium from fortified milk. Food Chem. 2014 | first author:Kaushik R.
  • The influence of cellular source on periodontal regeneration using calcium phosphate coated polycaprolactone scaffold supported cell sheets. Biomaterials. 2014 | first author:Dan H
  • Targeted analysis of polyphenol metabolism during development of hop (Humulus lupulus L.) cones following treatment with prohexadione-calcium. Food Chem. 2014 | first author:Kavalier AR
  • Parallel acceleration for modeling of calcium dynamics in cardiac myocytes. Biomed Mater Eng. 2014 create date:2013/11/12 | first author:Liu K
  • Numerical Analysis of the Effect of T-tubule Location on Calcium Transient in Ventricular Myocytes. Biomed Mater Eng. 2014 create date:2013/11/12 | first author:George UZ
  • Microencapsulated rBMMSCs/calcium phosphate cement for bone formation in vivo. Biomed Mater Eng. 2014 create date:2013/11/12 | first author:Wang J
  • The calcium-sensing receptor R990G polymorphism is associated with increased risk of hypertriglyceridemia in obese Chinese. Gene. 2014 | first author:He YH
  • Bone formation induced by strontium modified calcium phosphate cement in critical-size metaphyseal fracture defects in ovariectomized rats. Thormann U, Ray S, Sommer U, Elkhassawna T, Rehling T, Hundgeburth M, Henß A, Rohnke M, Janek J, Lips KS, Heiss C, Schlewitz G, Szalay G, Schumacher M, Gelinsky M, Schnettler R, Alt V. Biomaterials. 2013 Nov.
  • Picomolar Amyloid-β Peptides Enhance Spontaneous Astrocyte Calcium Transients. J Alzheimers Dis. 2014 create date:2013/08/21 | first author:Lee L
  • Repair of rabbit segmental femoral defects by using a combination of tetrapod-shaped calcium phosphate granules and basic fibroblast growth factor-binding ion complex gel. Honnami M, Choi S, Liu IL, Kamimura W, Taguchi T, Hojo H, Shimohata N, Ohba S, Koyama H, Nishimura R, Chung UI, Sasaki N, Mochizuki M. Biomaterials. 2013 Dec.
  • Calcium and potassium content in beef: Influences on tenderness and associations with molecular markers in Nellore cattle. Meat Sci. 2014 create date:2013/09/03 | first author:Tizioto PC
  • Combined effects of potassium lactate and calcium ascorbate as sodium chloride substitutes on the physicochemical and sensory characteristics of low-sodium frankfurter sausage. Meat Sci. 2014 | first author:Choi YM Optical Calcium Imaging Using DNA-Encoded Fluorescence Sensors in Transgenic Fruit Flies, Drosophila melanogaster. Dipt S, Riemensperger T, Fiala A. Methods Mol Biol. 2014
  • Novel phosphorus-containing cyclodextrin polymers and their affinity for calcium cations and hydroxyapatite. Wintgens V, Dalmas F, Sébille B, Amiel C. Carbohydr Polym. 2013 Oct.
  • Lipoteichoic acid from Staphylococcus aureus directly affects cardiomyocyte contractility and calcium transients. Mutig N, Geers-Knoerr C, Piep B, Pahuja A, Vogt PM, Brenner B, Niederbichler AD, Kraft T. Mol Immunol. 2013 Dec.
  • Creation of reduced fat foods: Influence of calcium-induced droplet aggregation on microstructure and rheology of mixed food dispersions. Wu BC, Degner B, McClements DJ. Food Chem. 2013 Dec.
  • Clinical relevance and utility of cetuximab-related changes in magnesium and calcium serum levels. Stintzing S, Fischhaber D, Mook C, Modest DP, Giessen C, Schulz C, Haas M, Boeck S, Michl M, Stemmler J, Laubender RP, Heinemann V. Anticancer Drugs.
  • Calcium mediated formation of phosphorylcholine-based polyplexes for efficient knockdown of epidermal growth factor receptors (EGFR) in HeLa cells. Ahmed M, Ishihara K, Narain R. Chem Commun (Camb). 2014.

Calcium Isotopes

Calcium has five stable isotopes: 40Ca, 42Ca, 43Ca, 44Ca and 46Ca

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
40Ca 39.96259098 Observationally Stable 0+
42Ca 41.95861801 Stable 0+
43Ca 42.9587666 Stable 7/2-
44Ca 43.9554818 Stable 0+
46Ca 45.9536926 Observationally Stable 0+