elements, compound, and mixtures

Question 1

a type of matter in which all samples have fixed composition and identical properties

Answer 1

pure substance

Question 2

a pure substance that cannot be broken down into simpler pure substances by chemical means such as a chemical reaction

Answer 2

element

Question 3

a pure substance that can be broken down into two or more simpler pure substances by a chemical means

Answer 3

compound

Question 4

a ______ is an aggregate of two or more atoms in a definite arrangement held together by chemical bonds

Answer 4

molecule

Question 5

type of matter composed of varying proportions of two or more substances that are only physically mixed and not chemically combined

Answer 5

mixture

Question 6

contains only two atoms

Answer 6

diatomic molecule

Question 7

contains more than two atoms

Answer 7

polyatomic molecule

Question 8

a lot of components but can only he seen as one. you can’t distinguish the components

Answer 8

homogenous mixture

Question 9

contains visibly different phases, each of which has different properties

Answer 9

heterogenous mixture

Question 10

solid mixtures can be separated by hand

Answer 10

hand picking

Question 11

used by farmers to separate the grains from the stalks after harvesting

Answer 11

threshing

Question 12

type of separation that uses wind or air blown by separating light components

Answer 12

winnowing

Question 13

separates dry mixtures by passing through a sieve

Answer 13

sifting or sieving

Question 14

material is extracted from a mixture using a magnetic force

Answer 14

magnetic attraction or magnetism

Question 15

spin sample very rapidly

Answer 15

centrifugation

Question 16

liquids that do not mix together

Answer 16

immiscible