They can be a fun way to learn how to use the table and become familiar with it, so that you can solve chemistry issues and find facts. Hence it is a metal belong to the group 2. ii) The radius of calcium is smaller than potassium because both elements lie in the third period of the periodic table. The number of each element corresponds to the number of protons in its nucleus (which is the same as the number of electrons orbiting that nucleus). Calcium carbonate is taken as an antacid is effective for treating indigestion. 118.71 amu. The Periodic Table contains a lot of useful information on the elements. Calcium is classified chemically as one of the alkaline earth elements (that is, in Group 2 of the periodic table. Chemistry. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. Calcium is a chemical element.Its symbol on the periodic table (a list of all the elements) is Ca.Its atomic number is 20. Fe. Like the other elements placed in group 2 of the periodic table, calcium has two valence electrons in the outermost s-orbital, which are very easily lost in chemical reactions to form a dipositive ion with the stable electron configuration of a noble gas, in this c… 2 (IIA) When a fluorine atom becomes an ion, it will. However, this assumes the atom to exhibit a spherical shape, which is only obeyed for atoms in vacuum or free space. Its atomic number is 20 and symbol is Ca. Calcium is a silvery-white metal; it is relatively soft, but much harder than sodium metal.Calcium is a member of the alkaline-earth metals (Group II on the periodic table); these metals react vigorously with water, although not as violently as the Group I metals such as sodium or potassium:. Tool: Interactive Periodic Table: About the Group The second column of elements from the left of the periodic table is known as the Group 2 or alkaline earth metals. Calcium (Ca), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table. metals, copper, calcium, zinc and magnesium in order of decreasing reactivity with dilute hydrochloric acid. Calcium constitutes 3.64 percent of Earth’s crust and 8 percent of the Moon’s crust, and its cosmic abundance is estimated at 4.9 × 10 4 atoms (on a scale where the abundance of silicon is 10 6 atoms). Other metals sometimes classified or treated as "heavy" metals, such as beryllium (density 1.8 g/cm 3), aluminium (2.7 g/cm 3), calcium (1.55 g/cm 3), and barium (3.6 g/cm 3) are here treated as light metals and, in general, are not further considered. Ca is a soft, silvery-white alkaline earth metal. Originally the term "alkaline earths" referred only to the oxides of calcium, strontium, and barium. A calcium atom has twenty electrons, arranged in the electron configuration [Ar]4s . Log in Sign up. Its mass number is about 40.08. There are 2 valence electrons in the outer shell. 2) You may not distribute or commercially exploit the content, especially on another website. Browse . Preview this quiz on Quizizz. Say ‘calcium’ and a metallic substance does not immediately spring to mind, rather a chalky powdery rock or possibly a bottle of milk. The Cookies Statement is part of our Privacy Policy. NCI Thesaurus (NCIt) Calcium(2+) is a calcium cation, a divalent metal cation and a … Gravity. Which represents the electron configuration of a metalloid in the ground state? Calcium metal appears as a dull grey metal with a pale yellow tint. Calcium is the 20th element in the periodic table. Calcium is a very ductile silvery metal (sometimes described as pale yellow) whose properties are very similar to the heavier elements in its group, strontium, barium, and radium. 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