Flashcards
Atomic structure
Flashcards do conjunto (31)
- 1Define : The law of constant compositionfor a given compound, the relative number and type of atoms are constant
- 2Define: The law of conservation of massMass is neither created nor destroyed in chemical reactions. The total mass of materials present after a chemical reaction is the same as the total mass before the reaction.
- 3Define: the law of multiple proportionstwo elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the second element are in the ratio of small whole numbers
- 4—Dalton
- 5Who is named for the discovery of electron?J.J.Thomson
- 6—J.J.Thomson
- 7What is the result from the MILLIKAN’S OIL-DROP EXPERIMENT?Charge of electron (-1.602 x 10^-19 Coulomb)
- 8Who suggested the NUCLEAR MODEL OF THE ATOM ?Ernest Rutherford
from the effect of bombarding thin gold foil with alpha radiation - 9the three most important subatomic particlesproton, neutron, electron
- 10—A IS MASS NUMBER, Z IS ATOMIC NUMBER AND X IS ATOMIC SYMBOL OR ELEMENT SYMBOL.
- 11What is the nucleus symbol? proton = 47 neutron = 60 electron = 46
- 12—20 protons, 20 neutrons and 18 electrons
- 13What is isotope?The elements with the same atomic number but different mass numbers.
- 14Light or energy consists of particles which are called _________.photons
- 15What is the frequency of light with wavelength of 455 nm?6.59 × 10^14 s-1
- 16A particular orbital is designated by which quantum numbers ?n, l and ml
- 17Is this set of quantum numbers possible? n = 2, l = 2, ml = –2not possible, l must be less than n.
- 18Is this set of quantum numbers possible? n = 4, l = 2, ml = –2yes, l can be 0,1,2,3
for l =2 ml can be -2,-1,0,1,2 - 19—Niels Bohr
- 20Atomic orbitalA specific set of quantum numbers. The area where it is high possibility to find electrons.
- 21What is the possible values of the spin quantum number (ms)?The possible values are +½ and – ½.
- 22—p orbitals
- 23What is the shape of s orbitals?sphere
- 24How many d orbitals in d subshell?5 orbitals
- 25Which quantum number identify the orientation of atomic orbital?the magnetic quantum number (ml)
- 26Which quantum number identify the energy of the orbital?the principal quantum number (n)
- 27Which quantum number identify the shape of atomic orbital?the orbital angular momentum quantum number ( l )
- 28What is the possible values of the n quantum number?positive integer number (n = 1,2,3,...)
- 29—d orbitals
- 30What is cation?Positively charged ion occurs when an atom loses electron (s). It has more protons than electrons.
- 31What is anion?Negatively charged ion occurs when an atom gains electron(s). It has fewer protons than electrons.
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- Descrição
- University first year GeneralChemistry1 (Atomic Structure) FlashCards sobre Atomic structure, criado por Chuleeporn Thanomsilp em 27-05-2014.
- Criado por
- Chuleeporn Thanomsilp
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