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.
- 01:39 “very well, you discover that all these changes are not easily reversed. The moment they are formed, you can actually get them back. Also, reaction of matters and trials carbonate for, which dilutes acids, reaction of alk...”
- 02:25 “Examples of molecules are nitrogen, oxygen, molecule, chloride, sodium, chloride, calcium, chloride. Sodium channels are naturally 5, and the likes of them. The number of atoms in the molecule of element is called atomic...”
- 03:14 “The nest is Dalton's atomic theory, and according to Dalton in 1808, it proposed some theories, which form the basis for atoms. The first is all elements are made up of small individual particles, called atom. The nest i...”
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.
- 05:42 “The diagram on the screen is a silicon compound. You can see it is dark gray. This is silicon. It is an element. Now, forms of an element. Elements come in different forms but they all have the same type of atoms. Now, d...”
- 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...”
Water and Its Properties
This lesson covers the composition of water, including its chemical formula H2O. It explains the physical properties of water, such as its states (solid, liquid, gas), boiling and melting points, and its ability to dissolve various substances. The lesson also discusses the importance of water in liv
- 05:50 “Water molecules made up of two elements, hydrogen atom and oxygen atom. From the picture you would see hydrogen atom and the oxygen atom. A single oxygen atom contains six electrons. If you count, you will notice that yo...”
- 00:10 “Good day, everyone! My name is Mr. Ife and I'm your basic science instructor. Our lesson today is "Says, Water, and Rustam". A quick round through the objectives. At the end of the class, students should be able to expla...”
- 06:38 “When two hydrogen atoms are bound to an oxygen atom, the outer electron shell of oxygen is filled. Let's move to decomposition of water. How do we decompose water? I told you before, the main component of water is hydrog...”
Metals and their compounds
This lesson covers the characteristics of metals, including their ability to lose electrons and form positive ions. It discusses the classification of metals, their physical properties, and examples of common metals such as sodium, magnesium, and aluminum. The lesson also includes information on the
- 18:43 “with the Ozzides. Ozzides ion to release the electrons necessary for reduction of the matter. What am I talking about? So carbon of the A, carbon that reacts with the oxygen gives us CO which is carbon two or that plus t...”
- 20:28 “should be able to answer these questions. Number one, explain the term matters with two examples. All right, so an equation to show how a matter can lose electron or electrons to become positively charged. Then question...”
- 19:33 “to give you ZNO plus SO2. So you now have carbon that reacts with oxygen to give you this extra two electron. So the extra two electron now, we now react with that matter. M2 plus refers to this ZN. That will now be ZN2...”
Properties of Oxygen and Hydrogen
This lesson covers the properties, preparation, and tests of oxygen and hydrogen gases. It explains the role of these gases in the environment and their reactions with other elements. The lesson also includes information on the physical states of oxygen.
- 02:23 “Oxygen forms compounds by reacting with practically any other element. So oxygen can be had with hydrogen and it is going to give you water. So oxygen can react with any element. So oxygen in its normal state from the pi...”
- 03:10 “Now the fresh 20 elements are also a good overview of the different element groups. They also occur in more everyday chemical reactions. The elements are listed in order of increasing atomic number. You will be discussin...”
- 12:14 “Hydrogen gas is highly flammable, that is, it can burn and will burn in air at a very wide range of concentration between 4% to 75% by volume. Hydrogen does form compounds with most elements, despite its stability. Despi...”
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...”
- 08:29 “Three dimensional covalent bonds. So you'll see them in three, three. So here, you show you the distance between, vertical, between this bond, and the next one, is 154, it is a peakometer, actually, okay? As a unit, then...”
- 03:09 “Then we have a four-village electrode of carbon. So now, this is actually the neutral state of carbon, when it is not charged, okay? So we add a number of proteins, equal to a number of, basically, electrons, okay? So th...”
Chemical Symbols and Formulae
The lesson covers the symbols of the first 20 elements and how to write chemical formulae and equations. It explains the differences between elements, compounds, and mixtures, as well as the concept of radicals and valency. The laws of conservation of mass and constant composition are also discussed
- 12:18 “For chemical equation to actually represent a chemical reaction, it must be balanced. It must be balanced. That is, the number of atoms at the left hand side must be equal to the number of atoms at the right hand side. W...”
- 13:57 “And now you balance hydrogen. Check the atom count. You have 3 hydrogen A, you have 2 hydrogen A. The best I can balance this is, I put 2 A. Like I told you, you don't balance down. You don't balance by the soft grit. Yo...”
- 00:00 “Good day everyone, my name is Adekunle, I am teaching you chemistry and the topic we have now is chemical symbols, formulae and equation. Chemical symbols, formulae and equation. What are chemical symbols? The symbol of...”
Work, Energy and Power
This lesson covers the definitions of work, energy, and power. It explains potential and kinetic energy as forms of mechanical energy. The lesson also includes calculations related to work done and the concept of power as the rate of doing work.
- 09:52 “You prove what we call a teen plate. We also have chemical energy. Chemical energies are stored in bones. We have covalent and ionic bones. Now, these kind of energies exist in atomic, molecular or element states. Now, t...”
Careers and Applications in Chemistry
This lesson covers various career paths available for students studying chemistry, including roles in education, engineering, and health services. It also explains the applications of chemistry in food production, medicine, military, and environmental science.
- 00:02 “Good day students. My name is Adekunle. I'll be teaching you the subject chemistry. The topic is introduction to chemistry. What is chemistry? Chemistry is a branch of pure science that deals with the properties, composi...”
- 05:29 “The various steps we take are scientists to solve problems. And the first step we are like to mention is observation. What is observation? The use of our senses to look at our environment. And see, oh, this is how things...”
- 00:48 “Also you can become a laboratory assistant. The next career part is chemical engineering. We acknowledge your physics, chemistry, and mathematics. You can become a chemical engineer that involves the processes of combati...”
Gas Laws Overview
This lesson covers the basic gas laws including Boyle's Law and Charles's Law. It explains the relationship between volume, pressure, and temperature of gases, and introduces the Kelvin scale for temperature. The general gas equation PV = nRT is also discussed.
- 17:59 “of oxygen. I believe you understand that. For marbogadro's law, this is the next law. This is that equal volume of gases at the same temperature and temperature, contain the same number of molecules. Given the, a particu...”
- 01:47 “is reduced to 750 mm mercury. If you apply Boyz Law that says P1, V1 equals to P2, V2. And making V2 the subject implies that you divide both sides by P2. If you do that, if you do that, you will obtain V2 to be equals t...”
- 18:49 “Avogadro's constant. Avogadro's constant. Let's compute number of moles. Number of moles is equal to mass over molar mass. Number of moles is also equal to volume over molar gas volume. And number of moles from Avogadro'...”
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.
- 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...”
- 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...”
- 07:49 “So, as you can see here, then be collected from this gas jar here, as you can see here. So, now, last quantity of carburetor oxide, all right? is produced by a copy convoxial of carbure compounds like Petru, like we have...”