The chemical element represented by 'Fe' is ___. A. fluorine B. iron C. helium D. hydrogen 相关知识点: 试题来源: 解析 B。'Fe'代表的化学元素是铁(iron),fluorine 是氟,符号为 F;helium 是氦,符号为 He;hydrogen 是氢,符号为 H。反馈 收藏 ...
Helium is one of the basic chemical elements. In its natural state, helium is a colorless gas known for its low density and low chemical reactivity. It is probably best known as a non-flammable substitute for hydrogen to provide the lift in blimps and balloons. Because it is chemically ...
On Earth, the most abundant element in the crust is oxygen, while the most abundant element in the entire planet is believed to be iron. In contrast, the most abundant element in the universe is hydrogen, followed by helium. Element Synthesis Atoms of an element may be produced by the pro...
This chemical is a gas that is used to fill balloons. Helium Oxygen Nitrogen Carbon dioxide相关知识点: 试题来源: 解析 答案:Helium。“Helium”是氦气,用于填充气球。“Oxygen”是氧气;“Nitrogen”是氮气;“Carbon dioxide”是二氧化碳,都不是主要用于填充气球的气体。反馈 收藏 ...
A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus. The term is also used to refer to a pure chemical substance composed of atoms with the same number of protons. Until March 2010...
Why is helium considered a noble gas? Why does the concept of antisymmetric wavefunctions not need to be considered for the hydrogen atom? Explain why Zr4+ ion exists? Explain John Dalton's experiment that led to his atomic theory.
A halogen lamp, also known as a tungsten halogen lamp or quartz iodine lamp, is an incandescent lamp that has a small amount of a halogen such as iodine or bromine added. The combination of the halogen gas and the tungsten filament produces a halogen cycle chemical reaction which redeposits...
Chemical Elements:A chemical element is a substance that is made of only one kind of atom. When reduced to a single atom of the substance, it will retain the same chemical properties as any other amount of the substance.Answer and Explanation: ...
What is the chemical symbol for helium? A. 圆理己以构热北八单动按压深料易界容油领圆理己以构热北八单动按压深料易界容油领H圆理己以构热北八单动按压深料易界容油领圆理己以构热北八单动按压深料易界容油领 B. 较非组口许据先表际展取较非组口许据先表际展取He较非组口许据先表际展取...
HSHe-3 Storage(helium) HSHippocampus Sclerosis (neuropathology) Hippocampus Sclerosis(neuropathology) Copyright 1988-2018AcronymFinder.com, All rights reserved. Want to thank TFD for its existence?Tell a friend about us, add a link to this page, or visitthe webmaster's page for free fun content...