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Which Element Is the First and Lightest Element in the Periodic

question 30

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Which element is the first and lightest element in the periodic chart?


Definitions:

Pneumothorax

The presence of air or gas in the cavity between the lungs and the chest wall, causing collapse of the lung.

Lungs Collapse

A medical condition, also known as pneumothorax, where air enters the pleural space, causing the lung to collapse away from the chest wall.

Lungs Inflate

The process of the lungs expanding with air during breathing.

Pulmonary Ventilation

The process of moving air into and out of the lungs, facilitating gas exchange with the blood.

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