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
- 00:00 “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...”
- 17:18 “ion 3 chloride. The next KOH plus CO2 to give us K2 CO3 plus H2O. And then the next is C6 H2FO6 plus O2 to give us CO2 plus H2O. And the last is KCLO3 to give us KCL plus O2. All the equations are no balance. You need to...”
- 11:31 “from mathematical equation. Mathematical equation can simply be represented with conservation by equals to that for mathematical equation. Yeah, in chemistry that's why it is stated that chemical equation, different for...”
Simplification of Algebraic Expressions
This lesson covers the definition of algebraic expressions and their components, including terms and coefficients. It explains how to identify like terms, perform arithmetic operations on similar terms, and simplify expressions by inserting or removing brackets.
- 00:48 “Solve quantitative attitude problems on the use of brackets. Algorithmic expressions and terms. An algebraic expression is a mathematical statement that contains a combination of numbers. Symbols variable such as X or Y,...”
- 08:47 “Now, to say further on that, I'm going to talk about coefficients. Coefficient is the number or factor that has been multiplied by the variable. In this expression, minus four x, the coefficient is minus four. In this ex...”
- 01:36 “Here we deal with alphabets majorly, such as X or Y to represent the unknown values. Here are some examples of algebraic expressions. We have two X plus 10 Y plus one. You can note that it does not have an equal sign. Wh...”
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...”
- 00:00 “Good day, my name is Afeez. I will be your further maths teacher for today. This topic is sets. At the end of this topic, a learner should be able to know the idea of a set, set notations, applications, disjoint sets, an...”
- 11:36 “in the first set is that a set that contains all the members under the consideration of any given problem. That is, if you have A, which is a set and we have also B, which is also set. The members are elements in A and B...”