last name spelling help

Identify the word that spells 92. => Eighty-two or Forty-two or Seventy-two or Ninety-two..

Adam is practicing for a spelling contest to be held in the first week of August and it will be a Thursday. Use the calendar to find the date of the contest. => 10 th August or 24 th August or 3 rd August or 17 th August..

Name the polygon. => Quadrilateral or Octagon or Pentagon or None of the above..

Name the shape. => Circle or Rectangle or Square or Triangle..

The trivial names are the commonly used names of carbon compounds. They are derived mostly from the source of the compound e.g., the name of formic acid is derived from 'formicus' the Greek word meaning red ants. Names arrived in this way were ambiguous and ..

Name the angle. => an acute angle or a straight angle or an obtuse angle or a right angle..

Name the triangle. => equilateral triangle or right triangle or obtuse triangle or scalene triangle..

With the large growth of carbon compounds, it was necessary to name these compounds in a more systematic way. A committee called the 'International Union for Pure and Applied Chemistry' (IUPAC) put forward a system of giving proper scientific names to carbon based compounds. Th..

Selenium (Se) - 'Seles' Greek name for the moonPlutonium (Pu) - Neptunium (Np) Uranium (U)Mercury was named after a planet but derives its symbol Hg from the Latin word 'Hydragyrum' meaning liquid sil..

Binary acids - The binary acids (acids containing hydrogen and one more element) are named by adding the prefix hydro- and suffix ic to the name of second element. Example: Acid of hydrogen and chlorine (HCl) is hydrochloric acid. Acid of hydrogen and fluorine (HF) is hydrofluor..