This is false because it doesn't matter about the mass
A. an ion
The atom gains a net electrical charge if the number of protons and electrons are not equal which makes it an ion.
Gases, unlike solids and liquids, have neither fixed volume nor shape. They are molded entirely by the container in which they are held.
nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)