Once the relative mass scale was made, later experiments were able to relate the mass in grams of a substance to the number of atoms and an atomic mass unit—amu was found; 1 amu or Dalton is equal to 1.66×10-24 grams. At this time, chemists knew the atomic masses of elements and...
Chemistry问题1:An element is a substance that is made up of only one kind of atoms.One kind是指同一个的atom,还是Metal或者non-metal两大类中的一类?2:an element=an atom?有什麼分别?最好举个例子. 相关知识点: 试题来源: 解析 1.化学元素是根据原子核电荷的多少对原子进行分类的一种方法,把核...
Each kind of atom makes up a pure substance called an element. You may have heard of oxygen, lead, and gold. Well, these are all examples of elements. Can you believe that a pure gold necklace is made up of billions of gold atoms?
Ask a question Search AnswersLearn more about this topic: Atom | Definition, Composition & Examples from Chapter 2 / Lesson 1 268K Learn the definition of an atom, what atoms contain, the nucleus in the middle of an atom, what atoms look like, and examples of atoms. Related...
AnElectric Dipoleis formed from a substance that possesses two equal electric charges of opposite sign separated by a small distance. The best example of an electric dipole is an atom with one electron and one proton (Hydrogen). The proton acts as the source of positive charge, while the el...
2No matter what substance it may be, it is ___ atom. A.resulted fromB.formedC.made up ofD.made up with 3 No matter what substance it may be, it is ___ atom. A.resulted from B.formed C.made up of D.made up with 4No matter what substance it may be, it is___ atom. ...
Any substance is made of atom(原子)whether it is solid, liquid or gas.2. It's only a crossword(纵横字谜)puzzle that helps increase my vocabulary.3. These soils contain(包含) lots of organic matter.4. Organ (器官) donation to strangers is considered an unselfish act.5. You'll need ...
An atom is the indestructive fundamental unit of matter. A molecule is a substance that is made up of two or more atoms. The atoms constructing a molecule can either be of the same element or of different elements.Answer and Explanation: A molecule or ...
The main classifications of matter include the categories element and compound, either of which may also be called a substance (which is a less specific term), and mixture, of which there are also many sub-categories.Definition of a (Chemical) Mixture:...
Create an account Ask a question Our experts can answer your tough homework and study questions. Ask a question Search AnswersLearn more about this topic: Pure Substance in Chemistry | Definition, Properties & Examples from Chapter 5 / Lesson 13 432K What is a pure substance in chemistry...