Changes of Matter and Atomic Structure
The lesson covers the differences between physical and chemical changes in matter. It explains the concepts of atoms and molecules, their arrangements, and introduces atomic number, mass number, and isotopes. The lesson also includes calculations of relative atomic masses.
- 05:37 “atom of the element is heavier than 1/12, the mass of one atom of carbon 12. It has no unit. What are isotopes? From isotopes, which is the phenomenon, isotopes are atoms with the same atomic number, but different mass n...”
- 07:25 “If you evaluate very well, which I am now having completed with me, you do that. You have 26.5, 26.25 here, and then you have 9.35 here. If you send them together, you discover the relative atomic mass of chlorine will g...”
- 06:28 “The rate of atomic mass of an element is the average mass of its various isotopes as they occur naturally in any quantity. We are going to prove that with chlorine, chlorine 35 and chlorine 37, giving the relative abodea...”
Carbon and its Allotropes
The lesson covers the characteristics of carbon as an element and its various forms, known as allotropes. It explains the presence of carbon in nature, its compounds, and the two types of carbon oxides. The importance of carbon in living systems and its economic significance is also discussed.
- 02:21 “in many minerals, such as cell hydrocabons, in natural gas, petroleum, et cetera. In air, carbon dioxide is present in small quantity, which is 0.03 percent. Of course, we know that part of the constituents of air, so ou...”
- 22:46 “will have a polyethnose acid or wood gas, actually, so then for the polyethnose acid, which is a liquid fraction of co-tax million etanote acids, all right? Which contain propanone, which contain metanone, and also some...”
- 00:48 “of wood and coal, then transoccarbonate and hydrogen transoccarbonate as the last one. All right, now introduction. Basically, this is one of the very vital topics we have in chemistry. So I believe that the classes is r...”
Oxides of Carbon
This lesson covers the two types of carbon oxides: carbon monoxide and carbon dioxide. It explains their formation, characteristics, and methods of preparation in the laboratory. The lesson also defines the term allotrope and discusses the economic importance of these oxides.
- 35:26 “so you'll find out that for me, they then also measure three metals, basically that are very soluble in water, in the form of the hydro-t transocarbonyl. Thanks for watching, my name is Charles Christopher, till next tim...”
- 13:12 “Then, also, you have iodine five oxides be reduced to iodine, all right? So, as you can see, this equation here is showing that. Then, basically, uses of CO2 oxide. So, we have uses of CO2. So, CO2 oxide can be used as f...”
- 31:22 “in this example here, all right, so then, now, the other aspect of the compounds of carbon, so the cohydrogen transocarbonyl salts, now, these are actually acidic salts, we know that for acidic salt, like we explained pr...”
Definition and Classification of Chemicals
This lesson defines chemicals and explains their various forms, including solids, liquids, and gases. It also classifies chemicals their hazardous nature and discusses safety measures when using them.
- 06:30 “Now, for one carbon present in any particular compound of carbon, you have to use it to determine what's referred to as alotrupy. Alotrups of carbon talks about the shapes in which carbon can exist. Now, we have diamond,...”
- 04:57 “It is a very important part of every element because it gives the uniqueness of the element. Every atom contains what is referred to as a proton. Now, the number of proton in the atom of an element is what we call the at...”
- 04:08 “What we mean by building block is that they make up other compounds or mixtures. So, everything comes from being a single or everything originated from an element. Elements include your ion, which is called FE. That's th...”