or just because. Ready to gift · Self-care · For her See it on Amazon Family game night Build the Board. Race to Win. A 60 cm Snakes & Ladders-style puzzle game for family night. Ages 4+ · 2–6 players See it on Amazon Ages 2–5 Free right now Free Toddler Learning， meaning each atom contains 2 protons in its nucleus. What is the atomic mass of helium? The standard atomic weight of helium is 4.0026 u (unified atomic mass units). What category does helium belong to? Helium is classified as a noble gas. What is the state of helium at room temperature? Helium is a gas at 20 °C (68 °F). What is the boiling point of helium? The boiling point of helium is -268.93 °C / 4.222 K. What is the density of helium? The density of helium is 1.64e-4 g/cm³ (20°C). What is the electron configuration of helium? The electron configuration of helium is 1s2. When was helium discovered? Helium was discovered in 1895 by Sir William Ramsay; independently by Per Teodor Cleve and Nils Abraham Langlet. Is helium radioactive? Helium is a stable element with no naturally occurring radioactive isotopes. What is the biological role of helium? No known biological role. Non-toxic. What are the common uses of helium? Helium is used for: MRI cooling; NMR spectrometers; Balloons and airships; Arc welding; Deep-sea breathing mixtures. Gift solved Need a Gift That Feels Thoughtful? A ready-to-give self-care set for birthdays， thank-you gifts， ribs， numbers， Loading element data… Frequently Asked Questions about Helium What is the atomic number of helium? Helium has an atomic number of 2， time and weekdays in simple tap-and-listen lessons. No ads No in-app purchases No data collection TOP 5 BBQ essential Keep Your Hands Away From the Heat Long stainless-steel tongs for steaks， colours， and hot grill food. 14 inch reach · Locking handle See it on Amazon ， No Ads ABC， holidays， vegetables，。

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