Flashcards
Chemistry (chapter 2-5)
Cards in this deck (22)
- 1Cathode Rayssteams of electrons that travel in straight lines
- 2energy levelthe fixed energy value that an electron in an atom may have
- 3Heisenberg's Uncertainty Principlestates that it is impossible to measure the velocity and the position of an electron at the same time
- 4Orbitala region in space where there is a high probability of finding an electron
- 5Sublevela subdivision of a main energy level and consists of 1 or more orbitals of the same energy
- 6Elementa substance that cannot be split into simpler substances by chemical means
- 7Newlands' Octavesare arrangements of elements in which the 1st and the 8th element have similar properties.
- 8Mendeleev's Periodic LawWhen elements are arranged in order of increasing atomic weight
- 9Hydrogen Emission Spectruminstead of a continuous spectrum, a series of coloured lines were obtained
- 10Boyles Lawstates the relationship between volume and pressure of a fixed mass of a gas
- 11Periodsthe number that signifies the highest unexcited energy level for an electron in an element
- 12Transition Elementan element that forms at least 1 ion with a partially filled d sublevel
- 13Isotopesatoms of the same element having the same number of protons, but different number of neutrons
- 14Relative Atomic Massthe average mass of an atom relative to 1/2 of the mass of an atom of C12 isotope
- 15Ionic Bondthe attraction between oppositely charged ions
- 16Covalent Bondthe sharing of electrons in a pair
- 17Octet RuleWhen bonding occurs, atoms tend to reach an electron arrangement with 8 electrons in the outermost energy level.
- 18Valencythe number of atoms of a monovalent element with which each atom combines.
- 19Sigma Bondis formed by head-on overlap of orbitals
- 20Pi Bondis formed by the side-on overlap of p orbitals
- 21Hund's Rule of Maximum Multiplicitystates that when 2 or more orbitals of equal energy are available, the electrons occupy them singly before filling them in pairs, (x,y,z)
- 22The Pauli Exclusion Principlestates that no more than 2 electrons may occupy an orbital & they must have opposite spin
(electrons-in-boxes)
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- Fifth year Chemistry Flashcards on Chemistry (chapter 2-5), created by amy murphy on 20/11/2016.
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- amy murphy
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