atomic structure and the periodic table

Question 1

atom

Answer 1

smallest part of an element

Question 2

element

Answer 2

a substance made of only one type of atom

Question 3

compound

Answer 3

a substance made when two or more elements are chemically combined together

Question 4

molecule

Answer 4

any elements combined

even if they are the same element

Question 5

mixture

Answer 5

different elements or compounds not chemically combined together

Question 6

in a specific compound, the number of atoms of each element is what?

Answer 6

fixed

Question 7

what are the 4 different separation techniques?

Answer 7

filtration, crystallisation, distillation and chromatography