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...”
- 05:34 “Now to the chemical properties of oxygen. Oxygen is a highly reactive element. It can react and highly pragmatic, and is easily capable of combining with other elements. Oxygen can combine with hydrogen, it can combine w...”
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
- 01:35 “uttermost shell, tend to lose their electrons. For example, we have sodium and Meta, are you nicely by losing electrons to form sodium ion. So the ability to lose electron and become positively charged makes a Meta. So w...”
- 00:49 “their Metas and 3. Group 1, very strong Metals. Group 2, not as metallic as Group 1, also Group 3. Then we have no Metals. That's the other one painted in the yellow. We have transition elements. For this course, we just...”
- 00:00 “Hello everyone. I'm Mrs. Olabimpe Ayoko. I'm here to teach SS 3 chemistry and the topic is Metals and its compounds. So at the end of this lesson, everybody is expected to be able to define Metals with examples. The frie...”
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,...”
- 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...”
- 03:21 “We also have acids which are complex chemical substances. We have organic compounds, some of these organic compounds include your alcohol, your paraffin, and your aldehydes. Now, chemicals can also exist in another form...”
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...”
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.
- 23:36 “My name is Charles Christopher, till next time. [MUSIC]”
- 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...”
- 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
- 00:46 “sulfur, we use the phase letter S and some other examples like that. Combination of the phase, the next is, convolution of the phase letter, written in capital and one other letter from the name of the element, written i...”
- 03:19 “O's addition number and valency. Valency is the combined power of any element. Why O's addition number is the charge it carries. By this definition, you get to understand that valency has no charge and it's often conside...”
- 01:34 “the symbols of the different elements that combine chemical to form the compound, E, G, calcium carbonate, or calcium triadal carbonate for. Whereby, it contains carbon and it contains calcium, one atom of calcium carbon...”
Introduction to Sets
This lesson defines a set and explains set notation. It covers types of sets, cardinality, and set operations. Venn diagrams are also introduced for solving real-life problems.
- 00:52 “and h, e, c. Why small letters are used to denote an element of a set? So let's define what the element of a set is. These are the elements or members of a set given and also the element are separated using commas and en...”
- 05:51 “And that's give us nine. Also, let's look at the example number two as well. Example number two. We are to list, list the members or elements of the following sets. Our A is x such that five is less than x or less than e...”
- 06:42 “so we also, our eight will also be, we not be included. We also have B, which is a x such that zero less than or equal to x less than or equal to five. So it means we will start listing the element from zero. One, two, t...”
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.
- 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...”
- 04:51 “Atomic number, a mass number. What is atomic number? This is number of protons present in the nucleus of an element, and it is denoted towards z. The mass number of an element is the sum of the protons and the neutrons i...”
- 08:12 “the relative molecular mass of the compound. It actually gave us the actual number of moles of atoms of each element in one mole of the compound, as we are going to see with a particular example. The compound was found b...”