Valence and Chemical Formula Explain the concept of valence Valency is the capacity of an atom to combine with one or more atoms to form a molecule or compound. Valency also refers the number of electrons that an atom can
Constructing the modern periodic table has been a major scientific achievement. The first steps towards working out this table were taken long before anyone had any idea about the structure of atoms. The number of elements discovered increased steadily during
The Atom We learned early that matter is made up of small, indivisible particles. Everything around us is made of extremely small particles. These particles are either molecules or atoms. An atom is the smallest indivisible particle of an element
Hydrogen is the lightest of all the elements. There is very little hydrogen in the earth’s atmosphere. Hydrogen is so light that its molecules are not held by the earth’s gravity and they diffuse into space. Overall, it is the
Composition of air Air is a mixture of different gases. The gases that make up the air include nitrogen, oxygen, carbon dioxide, noble gases (argon, helium, neon, krypton and xenon) and a little water vapour. Air may also contain traces
Explain concept of matter Matter is anything that has mass and occupies space. Therefore, anything around us provided it has mass and can occupy the space, is termed as matter. There are many kinds of matter. Can you mention some?
Significance of scientific procedure The Concept of Scientific Procedure Explain the concept of scientific procedure The scientific method (procedure) is a process that scientists use to ask questions and conduct investigations to find answers to these problems. It is a
When you were in primary school, you used to learn science as a single subject. At this level of study, the subject will be broken up into three related subjects, namely Chemistry, Biology and Physics. The three subjects are closely
Translation is a process by which ideas that are written in one language ar...
Are the abilities that allow you to write effectively and concisely. A competent...
Reading is the process of going through written information or piece of wor...
What is Speaking? SPEAKING SKILLS: Speaking is simply the act of talking wh...
Listening is ability to accurately receive and interpret messages in the communi...
This is the field or branch of morphology which studies different principles or ...
Language is a symbol system based on pure or arbitrary conventions…...
Ecology is the study of the interactions between living things, such as humans, ...
EVOLUTION Evolution is a change in the genetic composition of a population...
Genetics is the study of heredity and variationHeredity- is the passage of chara...