Calcium - Element information, properties and uses | Periodic Table
网页Element Calcium (Ca), Group 2, Atomic Number 20, s-block, Mass 40.078. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Jump to main content
Calcium - Wikipedia
网页Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium.
Calcium | Definition, Properties, & Compounds | Britannica
网页2024年9月9日 · Calcium, one of the alkaline earth metals, chemical symbol Ca, atomic number 20, the most abundant metallic element in the human body.
Calcium (Ca) - Periodic Table
网页Calcium is the 20th element in the periodic table and has a symbol of Ca and atomic number of 20. It has an atomic weight of 40.078 and a mass number of 40. Calcium has twenty protons and twenty neutrons in its nucleus, and twenty electrons in four shells.
Chemical Symbol for Calcium – Ca - Periodic Table of Elements
网页2020年11月21日 · The chemical symbol for Calcium is Ca. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium.
Calcium (Ca) - Chemical Elements.com
网页Name: Calcium. Symbol: Ca. Atomic Number: 20. Atomic Mass: 40.078 amu. Melting Point: 839.0 °C (1112.15 K, 1542.2 °F) Boiling Point: 1484.0 °C (1757.15 K, 2703.2 °F) Number of Protons/Electrons: 20. Number of Neutrons: 20.
Calcium | Ca (Element) - PubChem
网页Calcium is a chemical element with symbol Ca and atomic number 20. Classified as a n alkaline earth metal, Calcium is a solid at room temperature.
Calcium | Ca | CID 5460341 - PubChem
网页Description. Calcium appears as a silvery, soft metal that turns grayish white on exposure to air. Used in metallurgy. CAMEO Chemicals. Calcium alloys, pyrophoric appears as a white to gray solid. Denser than water. Contact may cause burns to skin, eyes, and mucous membranes. May be toxic by ingestion. Used to make other chemicals. CAMEO Chemicals.
Calcium (Ca) - Periodic Table
网页Calcium is a chemical element of the periodic table with chemical symbol Ca and atomic number 20 with an atomic weight of 40.0784 u and is classed as alkaline earth metal and is part of group 3 (scandium group).
Calcium (Ca) - ChemicalAid
网页Isotopes. Mass Number. The sum of the number of protons and neutrons of an atomic nucleus. In other words, it's the sum of the number of nucleons in an atom. Relative Atomic Mass. The ratio of the average mass per atom of an isotope to 1/12 the mass of a carbon-12 atom. Relative atomic mass is also known as atomic weight (symbol: A r). Notes (Ca)