It is a gas that weighs 6 pound. sulfurhexafluoride
helium weighs -6 pounds. that's why when you inhale helium, your voice goes up. and when you inhale sulfur hexafluoride your voice is weighed down to a lower voice. it sounds awsome.
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The opposite of helium would be a heavier gas, such as xenon or radon, which have a higher atomic number and density compared to helium.
That would be sulfur hexaflouride. that weighs 6 pound, witch makes your voice go lower, if you inhale it. Helium is -6 pounds, which makes your voice go higher. there both safe to inhale, but i think you need a license to handle sulfur hexaflouride.
Helium-3 is the element that fits the description you provided. It has 2 protons, 1 neutron, and 2 electrons. Helium-3 is a rare isotope of helium found in very small quantities on Earth.
Common compounds for helium include helium-3 (He-3) and helium-4 (He-4), which are isotopes of helium. Helium is typically chemically inert and does not readily form compounds with other elements under normal conditions.
The element name for He is Helium. It is a colorless, odorless, and tasteless gas that is the second lightest and second most abundant element in the universe.
Helium is a nonmetal. Think about the helium balloon!