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.
- 00:00 “Good day everyone, my name is Adekunle, I will teach you chemistry. The topic we have now is particularly nature of matter, follow me as we roll. The first is changes of matter, where we have physical change and chemical...”
- 00:45 “is an example of a physical change. Also, we have change of states, melting, nucleation, solidification, anything that you do at home that is so easy to do. Those are examples of physical change. We also have magnetizati...”
- 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...”
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
- 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...”
- 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...”
- 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...”
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...”
- 07:23 “Elements can be grouped according to their properties, so you find that some elements have similar properties, and they don't share the same properties with some other elements. For example, we have the noble gases. Unde...”
- 08:08 “For sake of knowledge, the outer shell occupies 8 electrons, and their outer shell is usually filled up. We have the alkali-ed metals. Now, this set of elements also share the same characteristics. We have lithium, we ha...”
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...”
- 17:08 “Now, the test for hydrogen. The pop-up test, when it leads tapah, when using a leads tapah, it will produce an audible pop when placed in hydrogen glass, gas. Gases can be produced in the school laboratory when a compoun...”
- 03:55 “hydrogen, oxygen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, argon, potassium, and calcium. These are the first 20 ele...”