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(As) Chemistry: Electrons, Bonding And Structure OCR
Fichas del conjunto (50)
- 1PlasmaA mixture of positive and negative electrons.
- 2First ionisation energy (1st I.E)Is the energy required to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions.
- 3What is the first ionisation energy of Sodium?Na(g) ----> Na+(g) + e-
- 4Factors affecting ionisation energy:*Atomic Radius
*Nuclear Charge
*Electron shielding - 5The greater the atomic radius...The smaller the nuclear attraction experienced by outer electrons.
- 6The greater the nuclear charge...The greater the attractive force on the outer electrons.
- 7Electronic ShieldingIs the repulsion between electrons in different inner shells. Shielding reduces the net attractive force from the positive nucleus on the outer-shell electrons.
- 8The more inner shells...*The larger the electronic shielding
*The smaller the nuclear attraction experienced by outer electrons. - 9Successive ionisation energiesAre a measure of the energy required to remove each electron in turn.
- 10Second ionisation energyIs the energy required to remove one electron from each ion in one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions.
- 11What is the second ionisation energy of Lithium?Li+(g) --> Li2+(g) + e-
- 12Evidence for shellsSuccessive ionisation energies.
- 13ShellIs a group of atomic orbitals with the same principal quantum number, n.
- 14Principle quantum number (n)Is a number representing the relative overall energy of each orbital, which increases with distance from the nucleus.
- 15Atomic orbitalIs a region within an atom that can hold up to two electrons, with opposite spins.
- 16What's the formula for how many electrons each shell holds?2n squared
- 17How many electrons in shell.. *1 *2 *3 *4Shell 1 has 2 electrons.
Shell 2 has 8 electrons.
Shell 3 has 18 electrons.
Shell 4 has 32 electrons. - 18What shape is a s-orbital?Spherical shape.
- 19What shape is a p-orbital?Dumb-bell shape.
- 20How many s-orbitals in one shell?One s-orbital per shell.
- 21How many p-orbitals in one shell?Three p-orbitals per shell.
- 22How many d-orbitals in one shell?Five d-orbitals per shell.
- 23How many f-orbitals in one shell?Seven f-orbitals per shell.
- 24Sub-shellIs a group of the same type of atomic orbitals (s,p,d or f) within a shell.
- 25What is the order of sub-shells by energy level from smallest to largest?1s,2s,2p,3s,3p,4s,3d,4p,4d,4f
- 26Electron configurationThe arrangement of electrons in an atom.
- 27What is the Aufbau principle?*Electrons are added, one at a time, to 'build up' the atom.
*The lowest available energy level is filled first.
*Each energy level must be full before the next higher energy level.
*Each orbital is filled singly before pairing starts. - 28What is the electron configuration of Oxygen?1s(2),2s(2), 2p(4).
- 29When positive ions are formed, electrons are...removed from the highest energy orbital.
- 30When negative ions are formed, electrons are...Added to the highest energy orbital.
- 31What group in the periodic table have elements that are naturally single unbonded atoms?Group 0 (The noble gases)
- 32Octet RuleThe tendency for atoms to combine to acquire a noble gas configuration. (8 electrons in their outer shell)
- 33CompoundIs a substance formed from two or more chemically bonded elements in a fixed ratio, usually shown by a chemical formula.
- 34What compounds do ionic bonds occur in?Metal and non metal compounds. (Electrons are transferred from the metal atom to the non-metal)
- 35What compounds do covalent bonds occur in?Two non metals. (electrons are shared between the atoms)
- 36Where do metallic bonds occur?In metals. (electrons shared between all atoms)
- 37What is Krypton used in?Lasers for eye surgery.
- 38What is Argon used in?Filament light bulbs.
- 39What is Helium used in?Airships.
- 40What is Neon used in?Advertising signs.
- 41What is Xenon used in?Car headlights.
- 42Ionic bondIs the electrostatic attraction between oppositely charged ions.
- 43Giant ionic latticeIs a three-dimensional structure of oppositely charged ions, held together by strong ionic bonds. Eg. NaCl.
- 44A groupIs a vertical column in the Periodic Table. Elements in the same group have similar chemical properties and their atoms have the same number of outer-shell electrons.
- 45What is the overall charge of an ionic compound?Zero.
- 46What are the charges of: *NO3 *CO3 *SO4 *NH4*(NO3)-
*(CO3)2-
*(SO4)2-
*(NH4)+ - 47Covalent bondIs a bond formed by a shared pair of electrons.
- 48How many covalent bonds do the following atoms of these elements form? C,N,O,HC: 4 covalent bonds
N: 3 covalent bonds
O: 2 covalent bonds
H: 1 covalent bond - 49Lone pairIs an outer-shell pair of electrons that is not involved in chemical bonding.
- 50The sharing of two pairs of electrons forms...A double bond. eg. O=O
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- El usuario ha eliminado su información de asignaturas Fichas sobre (As) Chemistry: Electrons, Bonding And Structure OCR, creado por Usuario eliminado el 30/11/2016.
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- Usuario eliminado · nov 2016
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- Creado por Hannah Goodenough · 7 nov 2014
- Copiado por Tariq hudda · 30 nov 2016
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