Question

a sample of iodine is easiest to ship as a powder because it is dropdown, making it easy to break into small pieces.

helium is less dropdown than the elements that make up the air we breathe, so a balloon filled with helium will float in air.

plastic is a compound of nonmetallic elements, so its dropdown properties make it a popular coating for electric wires to prevent the current from escaping.

Explanation:

Analizar las propiedades físicas del yodo

El yodo es un no metal sólido a temperatura ambiente que se caracteriza por ser quebradizo o frágil (brittle), lo que permite que se rompa fácilmente en trozos pequeños o polvo.

Analizar la flotabilidad del helio

El helio flota en el aire porque tiene una menor densidad (less dense) que los gases que componen la atmósfera terrestre (principalmente nitrógeno y oxígeno).

Analizar las propiedades eléctricas del plástico

El plástico es un material no metálico que no conduce la electricidad, por lo que actúa como un aislante. Sus propiedades no conductoras (nonconducting) o aislantes lo hacen ideal para recubrir cables eléctricos.

Answer:

Question 1

A sample of iodine is easiest to ship as a powder because it is <blank>brittle</blank>, making it easy to break into small pieces.

Question 2

Helium is less <blank>dense</blank> than the elements that make up the air we breathe, so a balloon filled with helium will float in air.

Question 3

Plastic is a compound of nonmetallic elements, so its <blank>nonconducting</blank> properties make it a popular coating for electric wires to prevent the current from escaping.