这里主要取决于 the mass of这个词组里的the，虽然意思为“大量的”，但它后面的名词接的是单数形式，但如果是a mass of其后就接的是复数名词了！
amuatomicatom原子unitsatoms 1 By definition: 1 atom 12 C “weighs” 12 amu On this scale 1 H = 1.008 amu 16 O = 16.00 amu Atomic mass is the mass of an atom in atomic mass units (amu) Micro World atoms & molecules Laboratory scale measurements No matter what its source, a particula...
英语翻译 Virtually all the mass of the atom — the stuff and not the fluff — is in the nucleus.这句话应该怎么翻译呢? 答案 原子的所有质量--是核心的东西,而不是四周的绒毛(比喻质量微小的电子)--几乎都集中在原子核. 结果二 题目 英语翻译Virtually all the mass of the atom — the stuff...
An atom is the smallest unchangeable component of a chemical element. Unchangeable means in this case by chemical means; i.e., by reactions with acids or bases or the effect of moderate temperatures, atoms may only be slightly changed, namely, in their degree of ionisation. Moderate ...
atomic mass- (chemistry) the mass of an atom of a chemical element expressed in atomic mass units atomic weight,relative atomic mass mass- the property of a body that causes it to have weight in a gravitational field combining weight,eq,equivalent weight,equivalent- the atomic weight of an ...
1 The relative atomic mass of an element is always D A the mass of an atom of the element relative to z the mass of a carbon-12 atom. B the mass of an atom of the element relative to the mass of a hydrogen atom.□ C the weighted mean mass of an atom of the element relative...
Then we can say that the mass of an atom found by comparing it with126C atom is called its relative atomic mass or Ar. So the Ar of hydrogen is 1, the Ar of magnesium is 24. As we have learned, the atoms of an element are not always identical, just like the isotopes, which ...
The mass number of argon is 40.How many protons, neutrons and electrons are there in an argon atom? ( ) 相关知识点: 试题来源: 解析 一个氩原子有 18 个质子、22 个中子和 18 个电子。 1. 原子序数: 氩的原子序数为 18,这意味着它的原子核中有 18 个质子。 2. 质量数: 氩的质量数为 40...
The mass of a carbon atom is1.9927×10−23g. How many carbon atoms are in a 12 gram diamond? Avogadro's Number: The mass of one atom of an element is equal to the average atomic mass of the element divided by Avogadro's number, which is the nu...
The two subatomic particles that make up the mass of an atom are protons and neutrons. Each of these has a mass of one AMU, or atomic mass unit...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your toug...