elements compounds mixtures and separating techniques

Question 1

what is a element

Answer 1

it is a pure substance in which all of the elements are identical it is found in the periodic table

Question 2

what is a compound

Answer 2

it is a substance made up of the atoms of two or more elements which have been joined together the atoms are chemically bonded and difficult to separate

Question 3

what is a mixture

Answer 3

a mixture is a substance made up of the atoms of two or more elements or compounds which have been joined together they are easy to separate

Question 4

what is an atom

Answer 4

it is the smallest part of a substance

Question 5

what is a molecule

Answer 5

it is two or more atoms chemically bonded the atoms can be from the same or different elements

Question 6

what is a pure substance

Answer 6

pure substances such as compounds and elements melt and boil at well-defined fixed temperatures for example the melting point of pure water is 0 degrees, and the boiling point is 100 degrees.

Question 7

what is filtration

Answer 7

is used to separate an insoluble solid from a pure liquid or a solution

Question 8

what is evaporation

Answer 8

evaporation is used to separate the solid solute from the solvent in a solution

Question 9

what is distillation

Answer 9

……. is used to separate the components of a solution

Question 10

what is crystallization

Answer 10

……… is used to purify substances and can be combined to understand the nature of the substances crystalized

Question 11

what is paper chromatography used for

Answer 11

……….. is used to separate colored chemicals or substances

Question 12

what is simple distillation

Answer 12

…….. is a separation technique used to separate a solvent from a mixture

Question 13

what is fractional distillation

Answer 13

………. is used for the purification of water and is also used to separate liquified air