write chemical formula of the following a) potassium b) calcium carbonate
Answers
Answer:
Potassium - K
Calcium carbonate - CaCO3
Explanation:
In order to write a chemical formula, it is important to know the symbol of the elements present in the compound, formula of the radicals and the valency of the elements in that compound. Following points should be kept in mind while writing a chemical formula.
Most of the compounds are binary compounds, i.e. they have two elements. Compounds with more than two elements are also known
An atom with a positive charge is called a cation whereas an atom with a negative charge is called an anion
For a compound containing a metal and a non-metal, the metal is named first followed by the non-metal. For example: NaCl which consists of Na+ (metal ion) and Cl– (non-metal ion)
Anions having -1 negative charge usually have a suffix as –ide. For example: F– – Floride
Anions having oxy
anions (oxygen + another element) usually have a suffix as –ate. For example – SO42- (Sulphate)
When a polyatomic anion has H– ion, bi- or hydrogen is used as a suffix. For example – HCO3–-Bicarbonate or hydrogen carbonate