Tip: to go back to the previous page, press Alt+◀︎ (or ⌘+◀︎ on Apple computers.) Alternatively, you can view the navigation bar to visit another page.
About Chemistry
Introduction
The timeline of the chemical elements.
-
Chemistry is an important subject to know. Chemistry plays an important role in our lives that help us survive in this world. It consists of chemical elements which include elements that are metals, semi-metals, liquids and gases. Examples include hydrogen and oxygen. Some elements help us live. As defined in the element timeline, two hydrogen and one oxygen yields water.
-
When a person thinks about chemistry, the person will know how chemistry affects his daily habits. When it drinks water, the pers​on is consuming it to stay hydrated. This is done through cellular respiration in the mitochondria of a cell.
History
-
The study of chemistry began with John Dalton who first discovered the atom. The study of the atom ranged from 1766 to 1844. He is famously known for introducing the atomic theory into chemistry. He discovered that elements contains atoms, they are identical in an element and they cannot be created nor destroyed. The theory was not accurate and it required more research.
-
Later on, another chemist, JJ Thompson who continued the atomic theory had discovered the electrons. In 1897, he studied cathode rays which proved that atoms were not indivisible. Electrons consist of negative charges which are subatomic particles. This theory was inaccurate and more research was needed.
-
The third chemist named "Ernest Rutherford" discovered particles and light rays in atoms from 1871 to 1937. These include alpha and beta. These light particles are considered radioactive and they decay which is a process called radioactive decay. He identified that alpha particles are equivalent to helium nuclei. The theory was still unclear. A lot more research is required.
-
The last chemist who contributed to the atomic theory was Niels Henrick David Bohr, (formally Niels Bohr.) He won the Nobel Prize for proposing the research of valence electrons of an atom in 1922. The atom contained electrons in an energy shell where the innermost had the least amount of energy and the outermost had the most amount of energy. The theory is understandable and accurate. Thus, we are still using his model today.
Uses Worldwide
-
Chemistry has many uses that include scientific projects and research. The periodic table is a diagram of the elements that we use. Scientists use chemical to conduct an experiment in a lab. One of which is using chemicals to create compounds that are used to create an antidote. They help cure infections and diseases that can be harmful. Another experiment would involve creating natural/artificial ingredients from elements.
-
Chemistry is not just used for lab experiments. It is widely known to our favourite foods that contain elements from the periodic table that enriches the taste. If you ever bought a box of cookies in a market or a store, you would have probably heard about an information about the nutrients. Most snacks with packaging contains a table of nutrition facts. It has a list of ingredients and their stats. For instance, you might see sodium on a box of cookies or iron on a bag of chips. We consume these elements because it significantly helps to control our hunger.
-
Chemistry can also be used in our daily routine. From cooking foods to paving sidewalks in a construction site, the materials used in those activities contain the elements from the periodic table. In sidewalks, they contain the compound called concrete. When you use a pan or a pot on a stove top, smelting minerals in a furnace, starting up a fireplace, lighting a campfire or using a blowtorch, you are creating a chemical reaction in the air whenever there is oxygen.
-
Chemistry can be found anywhere in nature including water and clouds. They contain molecules with various atoms. Those elements in such molecule that travel fast as gas are hydrogen and oxygen.
Curriculum
Big Ideas
-
Chemistry is a fundamental subject according to British Columbia curriculum. It requires students to apply their understanding to different areas of the subject.
-
Chemistry is used in our daily lives.
-
Matter is made up of tiny particles called the atom.
-
​The atomic theory explains what is inside the structure of atoms.
Structure of atoms example from a textbook.
Curricular Skills
-
Chemistry is a fundamental subject according to British Columbia curriculum.
-
It requires students to apply their understanding to different areas of the subject.
Conducting lavatory experiments skill tutorial guidebook.
Contents
Grade 8
-
In grade 8, students will learn the atomic theory about the atom. This is important to know how the atom was discovered by the scientists who contributed to the theory. It is about learning the atom's structure, the mechanics or how the atoms work and behave in a molecule.
-
Basic elements from the periodic table will also be studied in grade 8. These elements include hydrogen, oxygen and nitrogen.
-
Students will be able to conduct labs using chemicals from the teacher's instructions on their behalf.
Sample classroom with lab equipments preinstalled.
Evaluation
Score Breakdown
-
Teachers have different methods of evaluating students' progress. By default, assessments are the main parts of grading.
-
Quizzes, tests have their own scoring weights while the final exam is worth more. On average, at least 25% or a quarter is the finals, which may involve taking the final exam or a big project to finish the course.
-
Other evaluations may include finishing homework, doing assignments and labs.