Atoms, Elements And Compounds

Atoms consist of a nucleus surrounded by negatively charged electrons. Protons and neutrons are found within the nucleus (Figure created with BioRender.com). Letters from the alphabet are used to represent chemical elements. An element’s chemical symbol is a single capital letter or a capital letter followed by a lower case letter. Ethanol is a much larger molecule made of three types of atoms.

Ionic compounds are formed when a metal and a non-metal join together. When sodium metal is dropped into a gas jar of chlorine gas the elements react violently to form a new compound called sodium chloride joined by ionic bonds. To understand the influences leading to the formation of an ionic bond we need to consider the electronic arrangement of sodium and chlorine atoms. Sodium structure is 2,8,1 with one electron in the outer shell.

To organise observations and timings Hubble uses SPIKE which uses a very … Read More

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