Flashcards
SCIENCE
Flashcards do conjunto (26)
- 1—2000 years ago , Ancients Greeks thought that everything was made up of 4 elements.
- 2In 1661, Robert Boyle suggested that an element was a substance that could not be broken down into a simpler substance in a chemical reaction.In 1789,
Antoine Lavoisier , a French Nobleman made a detailed list of the substances that he believed were elements.
- 3In the 1820's, Jakob Berzelius was a Swedish chemist who replaced the geometric patterns used as a chemical symbols with letters that were an abbreviation of the elements name.In 1829, Johann Dobreiner was aware of 40 elements . He noted that some groups of three elements had similar properties and name these three groups triads.
- 4What is an Atom?An Atom is the smallest particle that makes up matter.
- 5Alkali MetalAn atom found in group 1 of the periodic table
- 6Alkaline Earth MetalsAt Atom found in group 2 of the periodic table.
- 7AnionNegatively Charged ion
- 8Atomic NumberNumber of Protons in an atom
- 9Bohr ModelA way to represent the electrons of an atom in a series of shells around the atomic number.
- 10CationA Positively charged Ion
- 11Covalent BondingA bond formed when two or more atoms share electrons
- 12Delocalized ElectronAn Electron in a molecule that can easily move between atoms.
- 13Electron ConfigurationThe arrangement of electrons in each electron shells surrounding an atom.
- 14ElementPure Substance made up of one type of atom
- 15GroupA vertical list of elements found in the periodic table that have things in common
- 16HalogensThe elements in Group 17 of the Periodic Table
- 17IonAn Atom that has gained or lost electrons resulting in a positive or negative charge.
- 18MetalA collection of elements found on the left handed of the Periodic Table that are malleable , lustrous , ductile and highly conducting.
- 19MetalloidSmall collection of elements that have a mixture of metals and non metals.
- 20Noble GasA collection of gaseous elements found in group 18 of the Periodic Table.
- 21Non MetalsA collection of Elements found on the right handed side of the periodic table.
- 22PeriodA horizontal list of elements found in the periodic table.
- 23Shell DiagramA diagram that shows the arrangement of electrons and electrons shells in an atom.
- 24Transition MetalsAn Element found in group 3 - 12 of the periodic table.
- 25Valence ShellThe Outermost electron shell in an atom that contains electrons
- 26How is the Atomic Number and Name of an atom determined ?The Number of Protons it contains in it nucleus
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- Year 10 Sciences FlashCards sobre SCIENCE , criado por sienna buswell em 26-02-2022.
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