COMPOUNDS AND THEIR PROPORTIONS All elements are represented by a chemical symbol. It is either a single capital letter, or a capital letter followed by a small letter. Examples: Ca = calcium Cu = copper C = carbon N = nitrogen Combinations of symbols represent compounds. These compounds are called chemical formulas. Example: H20 2 …
MATTER Matter is: Anything that has mass and occupies space (has volume) Composed of particles (molecules, ions, atoms). These are in constant motion attracting one another with inter-particle forces (or cohesive) Is a solid, liquid or gas depending on interparticle forces of attraction and spaces between particles. Matter has many properties. It can have …
CLASSIFICATION OF SUBSTANCES Matter Matter can be classified as either a mixture or a pure substance. Mixtures contain at least two substances. If you can see the different parts of the mixture it is called a mixture.E.g. Soil and concrete Properties of mixtures depend on the proportions of the parts. Have you ever made …
Which apparatus? You wouldn’t dream of trying a chicken using a spoon, or of drying your hair in over a stove! In everyday life, we need to use the right tools for the job we are doing. The same is true in the science lab. There are lots of types of different chemical apparatus, all …
SCIENTIFIC METHOD The scientific method is a set of ideas or a procedure that scientists use to investigate things they want to understand. By using the method, you can be sure you’re carrying out your project correctly. The scientific method allows you to investigate an experiment in a step-by-step method. Problem: What are you going …
Safety rules and regulations Your school science laboratory is set up so that you can perform science experiments in safety provided that you follow the proper procedures and safety precautions listed below. Your teacher will give you specific information about the safety routines used in your school. It is essential for all concerned that certain …
INTRODUCTION TO CHEMISTRY Welcome to Chemistry, the Science concerned with the study of matter. In simplest terms, chemistry is the science of matter. Anything that can be touched, tasted, smelled, seen or felt is made of chemicals. Different thing feel, taste, smell and appear differently- like t fresh vegetables. If you are blindfolded and …