【题目】Atoms are building materials ofall matter, because by putting together atoms in different ways, all elements and compoundscan be formed .An element is a substance or a kind of thing that has only one type of atom . Pure oxygen has only oxygen atoms . Elements aresubstances which ...
3.011×1022 atoms of an element weight 1.15 g. The atomic mass of the element is :- A10 amu B2.3 amu C35.5 amu D23 amuSubmit 3.011×1022 atoms of an element weighs 1:15gm. The atomic mass of the element is: A23 B10 C16 D35.5Submit 1 atom of an element weighs 1.792×10−22g...
For instance, an element is Na while a compound is NaCl. The simplest unit of an element is known as the atom while the simplest unit of a compound can be a molecule or formula unit. Answer and Explanation: The number of protons is the same ...
We are asked how to calculate the number of atoms of an element if you are given the mass of the sample. The procedure is as follows: 1. Convert...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question...
an element is a substance ,all of ___ atoms have the same atomic number为什么选whose ?. 答案 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(注意啦!在定语从句表示从属关系的...
All atoms of an element have the same number of protons and electrons, but the number of neutrons might differ. 同种元素的原子具有相同的质子数和电子数,但中子数可能不同。 For example, there are three types of potassium atoms that occur naturally. All three types contain 19 protons and 19 ...
D or E, represents:(i) an atom of an element in Group VI of the Periodic Table D[1](ii) an atom of a reactive metal...[1](iii) an atom with a proton number of 17B[1](iv) an atom that forms a stable ion with a charge of 2-D[1](v) an atom of oxygen.D[1] 相关...
解答一 举报 An atomic weight (relative atomic mass) of an element from a specified source is the ratio of the average mass per atom of the element to 1/12 of the mass of an atom of 12C.and NA=6.02*10^23therefore ... 解析看不懂?免费查看同类题视频解析查看解答 ...
a flux of atoms of an element, for example an element v, by irradiating a target (17) composed of a compound of the element, for example a iii-v compound.using a pulsed laser (21) whose energy density per pulse is at least equal to the threshold of the element, and atomic emission...
[2,5],J...(v) is an atom of an element from Group Vll of the Periodic Table,L...(vi) is an atom of a noble gas.D(b) Two of the six atoms shown are isotopes of each other.(i) What is meant by the term isotopes?(atoms with) same number of protons/atomic number/ of same...