Helium is atomic number 2 on the periodic table, with the element symbol He. It is a colorless, flavorless gas, best known for its use in filling floating balloons. Here is a collection of facts about this lightweight, interesting element: Helium Element Facts Helium Atomic Number:2 Helium ...
Helium is the chemical element with atomic number 2 and an atomic weight of 4.002602, which is represented by the symbol He. It is a colorless, odorless, tasteless, non-toxic, inert monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the ...
Gaseous chemical element, symbol: He, atomic number: 2 and atomic weight 4,0026 g/mol. Helium is one of the noble gases of group O in the periodic table. It’s the second lightest element. The main helium source in the world is a series of fields of natural gas in the United States...
Element Data Atomic Symbol: He Atomic Number: 2 Atomic Weight: 4.002602 Isotopes and Abundances: 3 He, 4 He, 5 He, 6 He, 7 He, 8 He, 9 He, 10 He 3 He 1 × 10 9 ~ 1 × 10 5 4 He 0.999999999 ~ 0.99999 5 He, 6 He, 7 He, 8 He, 9 He, 10 He not stable 1 Atm ...
第一条:Helium can also be referred to as 'atomic number 2', indicating its position as the second element in the periodic table. 说明/解释:这里用“atomic number 2”来指代氦,是因为氦在元素周期表中的原子序数是2。 第二条:Another term for helium is 'He', ...
Here are ten quick facts about the element helium, which is atomic number 2 on the periodic table and has the element symbol He.
Helium chemical element with atomic number symbol and weight,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行、
What is the atomic number for helium?Question:What is the atomic number for helium?Sun Element:Helium is named from the Greek word for sun, helios. This is because helium was first detected in the sun's corona. It was first observed by Pierre Janssen, an astronomer, in 1868 but not for...
Element Data Atomic Symbol: He Atomic Number: 2 Atomic Weight: 4.002602 Isotopes and Abundances:3He,4He,5He,6He,7He,8He,9He,10He 3He 1 × 10−9~ 1 × 10−5 4He 0.999999999 ~ 0.99999 5He,6He,7He,8He,9He,10He not stable ...
atomic number 2,He chemical element,element- any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter argonon,inert gas,noble gas- any of the chemically inert gaseous elements...