What is the atomic mass of an element?Atomic massAtoms are extremely small; the heaviest atoms have masses of about 10–22 g. Even an ultramicrobalance cannot measure the mass of a single atom. However, relative masses of atoms of different elements can …

Test for Cations and Anions in Aqueous Solutions Test for anions in aqueous solutionsWhen a salt is dissolved in water, the free anion will be present in the aqueous solution. Tests can then be carried out to identify the anion.The following shows the v…

Redox reaction in the displacement of metals from its salt solutionGenerally, metals are good electron donors and therefore are good reducing agents. However, different metals have different strength as reducing agents.The strength of metals as reducing …

How is glass produced from raw materials?GlassThe raw material for making glass is sand (silicon dioxide or silica) which is abundant in the Earth’s crust.Glass is formed when silicon dioxide is melted and mixed with other substances like lead(II) oxide,…

What are the Three Ways to Charge an ObjectThe positively charged particles in an atom are called protons. The negatively charged particles are called electrons. Usually, the atom as a whole consists of an equal number of positive and negative charges, a…

How do you write the formula for ionic compounds?Method to deduce the formulae of ionic compounds:Metals from Groups 1, 2 and 13 combine with non-metals from Groups 15, 16 and 17 to form ionic compounds. Table shows how the metal atoms of Groups 1, 2 an…

What is alloy metal?An alloy is a mixture of two or more elements with a certain fixed composition in which the major component must be a metal.In the process of making alloys, one or more foreign elements are added to a molten metal. Thus, the positions…

Displacement of Halogen from Halide SolutionGenerally, halogens are good electron acceptors and therefore are good oxidising agents.(a) When going down Group 17, the size of the halogen atoms increases. The nucleus is further away from the outermost occu…

What is Empirical and Molecular Formula?Empirical formulae and molecular formulae:A compound can be represented by two types of chemical formulae. (a) Empirical formula (b) Molecular formulaEmpirical formula of a compound gives the simplest whole number…

How do you Name an Ionic Compound?Naming of chemical compoundsChemical compounds are named systematically according to the guidelines given by the International Union of Pure and Applied Chemistry (IUPAC).For ionic compounds, the name of the cation come…