Son dos tipos de sustancias diferentes opuestas entre si, cada una reúne propiedades especificas, que modifican el comportamiento de las soluciones químicas se encuentran en estado:

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

it would be d. henry moseley

hope this !

and sorry if i'm late. have a good rest of your day! : d

the answer is na (sodium)