Davy is well known for his electrolysis experiments. This fact has key implications for the building up of the periodic table of elements. Atomic Mass: 40.078(4) Electron Configuration: Ar4s 2 Full: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 (full) Discovery: Sir Humphry Davy in 1808. The ordering of the electrons in the ground state of multielectron atoms, starts with the lowest energy state (ground state) and moves progressively from there up the energy scale until each of the atom’s electrons has been assigned a unique set of quantum numbers. It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. (The atomic number says where Calcium sits in the periodic table.) It has 20 protons and 20 electrons (if is an atom, see ion). Its symbol on the periodic table (a list of all the elements) is Ca. Calcium carbonate is an inorganic salt used as an antacid. It is a calcium salt, a carbonate salt, a one- carbon compound and an inorganic calcium salt. It has a role as an antacid, a food colouring, a food firming agent and a fertilizer. In the periodic table, the elements are listed in order of increasing atomic number Z. Very pure calcium metal, not corroded Calcium metal in air, corroded. Calcium carbonate is a calcium salt with formula CCaO3. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. The configuration of these electrons follows from the principles of quantum mechanics. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. See also: Atomic Number – Does it conserve in a nuclear reaction? Atomic Number and Chemical PropertiesĮvery solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Classified as a n alkaline earth metal, Calcium is a solid at room temperature. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. Calcium is a chemical element with symbol Ca and atomic number 20. Some element symbols are derived from non-English names, e.g., Na for sodium from the Latin name natium, Cu for copper from Latin cupurum, and Ag for silver from Latin argentum. In a neutral atom there are as many electrons as protons moving about nucleus. Usually, another alphabet is also chosen from the elements name and written as a small letter, e.g., Al for aluminum, Zn for zinc, and Ca for calcium. Periodic Table of Elements 1 H Hydrogen 1.008 2 He Helium 4.0026 3 Li Lithium 6.94 4 Be Beryllium 9.0122 5 B Boron 10.81 6 C Carbon 12.011 7 N Nitrogen. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10 -19 coulombs.

Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The nucleus is composed of protons and neutrons. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons.

Ca element symbol