Answer:
The definition of air pressure is the force exerted onto a surface by the weight of the air. An example of air pressure is the average sea-level air pressure of 101.325
Explanation:

<span> Charge and it is surrounded by 5 electrons.</span>
The answer is still 5 grams because mass can not be changed or destroyed.
Row: similarity in properties.
Column: Arrange according to the elements' masses and valency.
A) radius: 1.4cm
diameter: 2.8cm
b) radius: 2.1cm
diameter: 4.2cm