Elements & the Periodic Table
An element is a substance that cannot be broken down into simpler substances by chemical means. - Pure substances can be also compounds. But compounds can be chemically broken down to the e...
Lc Chemistry Notes
Notes tagged with "lc chemistry".
The Electron: Crash Course Chemistry
The story of the electron and describes how reality is a kind of music, discussing electron shells and orbitals, electron configurations, ionization and electron affinities, and how all thes...
Some famous scientists associated with chemistry
The Atom - John Dalton – proposed a theory about atoms in 1808. - William Crookes – investigated what happens when electricity passed through gases. - J.J Thomson – discovered the electron....
Experiment: To prepare ethene and examine its properties
Ethene gas is prepared by dehydrating ethanol (drug found in alcoholic drinks). Ethene is a colourless gas with a sweet smell. It is a insoluble in water but can dissolve in organic solvents...
Chemistry Experiment: Flame Tests (Li, Na, K, Ba, Sr & Cu)
To carry out flame tests with salts of lithium, sodium, potassium, barium, strontium and copper.Procedure 1. Light a bunsen burner and adjust it to obtain a blue flame. 2. Dip the wooden sp...
Arrangement of Electrons in the Atom
To understand the arrangement of electrons in atoms, Neils Bohor understood the spectra. When white light (eg. sunlight or light from an ordinary electric light bulb) is passed through a pri...
The Mass Spectrometer
A mass spectrometer is used to: - Identify the presence of isotopes. - Measure the relative abundances of isotopes. - Measure relative atomic masses and relative molecular masses. - Identif...
Oil Refining: Organic Chemistry – Summary
Fractional Distillation: This involves the heating of crude oil, and separating the various mixtures in the basis of their boiling points.Octane Number The Octane Number of a fuel is a meas...
All Chemistry Definitions to Learn for Leaving Certificate - Higher Level
The Atom - Dalton’s Atomic Theory: All matter is made up of indivisible atoms which cannot be created or destroyed. - William Crookes discovered the Electron. Cathode ray tube. - JJ Thomson...
Oil Refining: Organic Chemistry – Summary
Fractional Distillation: This involves the heating of crude oil, and separating the various mixtures in the basis of their boiling points.Octane Number The Octane Number of a fuel is a meas...