Calcium is a chemical element with the symbol Ca and atomic number 20.
What is the 20th atom?
Calcium is a dull silver solid metal with a faint yellowish cast. Atomic Number: 20. Symbol: Ca. Atomic Mass: 40.078(4) Electron Configuration: [Ar] 4s2.
What is the meaning of atomic number of 20?
atomic number 20 Add to list Share. Definitions of atomic number 20. a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals. synonyms: Ca, calcium. types: calcium ion, factor IV.
