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Key points. Everything in the known universe is made up of the elements found on the periodic table. There are over 100 different. elements. , which are made up of atoms. Particle diagrams are...
1 day ago · Alien: Romulus (2024) October 15, 2024 / Roger Edwards. Some films are made with the intention of starting a franchise, others evolve into one after a surprise box office success and lucrative sequels. Alien (1979) falls into the latter category. A mid-budget science fiction horror film that was well crafted and then benefited immensely by ...
Squid Game (Korean : 오징어 게임) is a South Korean dystopian survival thriller television series created, written and directed by Hwang Dong-hyuk for Netflix. Its cast for the first season includes Lee Jung-jae, Park Hae-soo, Wi Ha-joon, HoYeon Jung, O Yeong-su, Heo Sung-tae, Anupam Tripathi, and Kim Joo-ryoung.
- Elements. There are lots of different substances but only just over a hundred elements. An element is a substance that is made up of only one kind of atom.
- Symbols and names. Sometimes it is easy to tell which element a symbol stands for. For example, C stands for carbon and Li stands for lithium. But sometimes the symbol comes from a name for the element that is not an English word.
- Compounds. A compound is a substance that contains atoms of two or more different elements, chemically joined together. For example, water is a compound of hydrogen and oxygen, chemically joined together.
- The periodic table. All the different elements are arranged in a chart called the periodic table. A Russian scientist called Dmitri Mendeleev produced one of the first practical periodic tables in the 1869.
The term polymer refers to a very long molecule made of repeating smaller molecules that have been joined together. Polymers can be natural or synthetic. Synthetic polymers are also known as...
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Oct 13, 2017 · Consider keratin (KAIR-uh-tin), the stuff your hair and nails are made from. Even the DNA in your cells is a polymer. By definition, polymers are large molecules made by bonding (chemically linking) a series of building blocks. The word polymer comes from the Greek words for “many parts.”.
