Define the following. (a) Elements (b) Compound (c) Homogenous mixture (d) Heterogeneous mixture (e) Metalloids (f) Noble gases.

Define the following. (a) Elements (b) Compound (c) Homogenous mixtur

1.	Define the following. (a) Elements (b) Compound (c) Homogenous mixture (d) Heterogeneous mixture (e) Metalloids (f) Noble gases.
Answer» Solution :(a) An element can be defined as a pure substance in which a molecule is made up of only one KIND of atom and which cannot be split into simpler SUBSTANCES by any CHEMICAL means. (b) A compound can be defined as a pure substances in which a molecule is made up of more than one kind of atom and can be split up into two or more simpler substances. (c) A homogeneous mixture can be defined as a substance in whcih there is uniform distribution of molecule of different substance. (d) A heterogeneous mixture can be defined as a substance in which there is non-uniform distribution of different kinds of molecules in the substance. (e) METALLOIDS are the elemetns which possess some properties of METALS and some properties of non-metals. (f) Noble gases are gaseous elemetns which do not take part in chemical reactions with any other elements.