GENCHEM (L1.3 pure substances and mixtures))

composition

Matter may be classified according to their ______

pure substances

Matter have a fixed or definite composition

mixtures

Combinations of two or more substances

pure substances

Made up of a specific number of atoms or groups of atoms that are combined through a chemical reaction

elements

The simplest form of matter that is made up of only one kind of atom

element

Cannot be decomposed into simpler forms by physical or chemical means

metals

Leftmost of the periodic table

nonmetals

rightmost of the periodic table

metalloids

staircase-like line between metals and nonmetals

compound

Composed of two or more different elements that are combined in a fixed ratio by a chemical reaction

mixture

Consist of two or more pure substances that are combined physically

homogeneous mixture

Consists of substances that are evenly distributed all throughout that cannot be distinguished by the naked eye

solution

It is also known as homogeneous mixture that is composed of two components

solute

The substance that is dissolved by another substance

solvent

The dissolving medium in which the solute dissolves

soluble

When substances dissolve in a given solvent

miscible

When liquids are soluble in each other at all proportions

heterogeneous mixture

Consists of substances that are not evenly distributed all throughout that can be distinguished by the naked eye

colloids

A heterogeneous mixture with particles that are bigger than those in a solution but smaller than those in a suspension

suspensions

A heterogeneous mixture with suspended particles that are large enough to be seen by the naked eye

tyndall effect

The phenomenon wherein light is scattered