The minimum intake is about 4.7 mg in average. Humans take several forms of potassium but the most common one is potassium chloride. Problem 1: Which is the most common form of potassium taken by us? It can also lead to dental changes, alterations in the brain, etc Lack of calcium in the blood can cause a disease called “Hypocalcemia” also known as calcium deficiency in the human body.We can find 2% of the calcium in the human body. Calcium is important for both animal and plant life.Calcium hydroxyl phosphate is the principal inorganic element of teeth and bones.Calcium carbide is used for the production of plastics and acetylene gas.Calcium concatenate is used as a food additive.It is also used as an alloying agent for the production of some metals.It can be used as a reducing agent in the metal extraction process.It is needed for nerves to carry messages between the brain and every body part.Calcium helps to maintain strong bones to perform many necessary functions.Calcium can be used for many purposes.Compounds of calcium are highly reactive to acids.ĬaCO 3 + HCl ⇢ CaCl 2 + HO + CO 2⇡ USES OF CALCIUM.When calcium comes in contact with air, it forms a coating of nitride and oxide.The dissolved form of calcium bicarbonate is found in hard water.The chemical and physical characteristics of an element are determined by the stability of its outer (valence) electrons. There are 20 electrons occupying accessible electron shells (rings). There are 20 protons and 20 neutrons in the nucleus. Isotopes of Calcium: Calcium has five naturally stable isotopes they are – Calcium 40, Calcium 42, Calcium 43, Calcium 44 and Calcium 46. Gypsum, anhydrous, fluorite, etc are also some of the sources of calcium.įollowing is the summarized details of Calcium: Symbol The most common calcium compound found on Earth is calcium carbonate. It gives cations at the time of ionization The outermost shell of calcium comprises two valence electrons. Calcium is also employed by our nervous system to aid in the transmission of impulses throughout our bodies.Ĭalcium is rated as the 5th most abundant element found on the earth’s surface. Calcium (Ca) is an essential mineral that helps our bones stay strong and capable of bearing our weight. It plays a vital role in the functioning of living cells and its deficiency or excess amount can cause abnormal heart rhythm and other various electrocardiographic abnormalities.Ĭalcium, with atomic number 20, is denoted by the symbol Ca in the periodic table.It was suspected in 1702 that potassium is a distinct element that combines with the same anions to produce similar salts and was proven in 1807 by using electrolysis.Potassium was the first metal to get isolated by electrolysis.

It can also be used as a medium of heat exchange and is used in nuclear power plants.Potassium carbonate is used for the production of glass.Excess potassium diet helps to reduce blood pressure and prevents heart strokes.Potassium is used for muscle contraction.Industries use potassium for making soaps, detergents, dyes, gunpowder, etc.Potassium is widely used in our day to day life and some of which are mentioned below:.Role of Mahatma Gandhi in Freedom Struggle.c) Both experience the same effective nuclear charge. Which would you expect to experience a greater effective nuclear charge, a 2p electron of a Ne atom or a 3s electron of a Na atom? a) 2p electron of a Ne atom. Write a balanced equation for the reaction of cesium metal with: a) Cl.(g) b) H.O(1) c) H (9) 10. Lingli Lu, Shengke Tian, Haibing Liao, Jie Zhang, Xiaoe. Write a balanced chemical equation for the reaction of solid selenium dioxide, Seo (s), with a) Water b) Aqueous sodium hydroxide 9. Seeds and Relocation during Germination Based on X-Ray Fluorescence Imaging of Zn, Fe, K, Ca, and Mn. Write the balanced chemical equation for the reaction of scandium oxide with nitric acid. Would you expect scandium oxide to be a solid, liquid, or gas at room temperature? 7. What is the electron configuration of a Tc3+ ion? a) 4d4 b) 5s24d2 c) 5814d3 d) 5s24d8 e) 4d10 6. The ground-state electron configuration of a Te atom is 5s24d5. Write the electron configurations for a) Ca b) Co c)S 5. Referring to the periodic table, arrange the atoms Ne, Na, P, Ar, K in order of increasing first ionization energy. Arrange Mg, Car, and Ca in order of decreasing radius 3.

Arrange Be, C, K, and Ca in order of increasing atomic radius 2.

K and ca element