This is the 6888th most frequent Portuguese word.
hélio
Helium (chemical element).
In this sentence, 'hélio' refers to the chemical element that is commonly used in various applications, such as filling balloons with lighter-than-air gas.
O gás hélio é utilizado para encher balões.
Helium gas is used to fill balloons.
Here, 'hélio' is referred to as the substance responsible for the action described—causing the balloon to inflate.
O balão inflou rápido devido ao hélio.
The balloon inflated quickly due to the helium.
In this instance, 'hélio' is used in a scientific context, discussing considerations about its properties for research purposes.