phr. 【化学】92号元素铀 英语解释 a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons相似短语 atomic number 92 phr. 【化学】92号元素铀 atomic number 2 phr. 原子量2;氦 atomic number n.[化]原子序数(指元素在周期...
Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in a n
The element having atomic number 92 View Solution Knowledge Check The atoms of the elements having same mass number but different atomic number are called- AIsotopes BIsobars CIsotones DIsomersSubmit The atoms of the elements having same difference between mass number and atomic number are called ...
atomic number 91- a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead protactinium,protoactinium,Pa metal,metallic element- any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed ...
An isotope of the element with atomic number 97 has been discovered as a product of the helium ion bombardment of americium. This isotope decays with the emission of alpha-particles of maximum energy 6.72 Mev (30 percent) and it emits lower energy alpha-particles of energies 6.55 Mev (53 ...
atomic weight - (chemistry) the mass of an atom of a chemical element expressed in atomic mass units atomic mass, 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...
结果1 题目元素周期表 Which element has the atomic number 29? A. Gold (Au) B. Tin (Sn) C. Copper (Cu) D. Zinc (Zn) 相关知识点: 试题来源: 解析 C) Copper (Cu) 答案: C) Copper (Cu) ... (继续展示其他试题及答案)反馈 收藏 ...
Atomic mass, the quantity of matter contained in an atom of an element. It is expressed as a multiple of one-twelfth the mass of the carbon-12 atom, which is assigned an atomic mass of 12 units. In this scale, 1 atomic mass unit (amu) corresponds to 1.66
an element is a substance , all of ___ atoms have the same atomic number为什么选whose ? 请高手讲讲..相关知识点: 试题来源: 解析 首先句子后面是作定语的,由主句可以知道,修饰的是主语element.因为atoms是原子的意思,对于元素来说,逻辑关系自然是“元素里的原子”,所以element和atoms具有从属关系,用whose...
Atomic Number: 1 Hydrogen is the first element in theperiodic table, meaning it has anatomic numberof 1 or 1 proton in each hydrogen atom. The name of the element comes from the Greek wordshydrofor "water" andgenesfor "forming," since hydrogen bonds with oxygen to form water (H2O). Rob...