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Sin título

Alice Butterworth 15 preguntas

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Preguntas del test (15)

  1. 1Nearly all of an atoms mass is in its [blank_start]nucleus[blank_end].
    Atoms contain the [blank_start]same number[blank_end] of protons as electrons.
    The total positive charge from protons is [blank_start]cancelled[blank_end] by the total negative charge from electrons.
    The overall charge of an atom is [blank_start]zero[blank_end] - an atom is [blank_start]neutral[blank_end].
    1. Anucleus
    2. Bsame number
    3. Ccancelled
    4. Dzero
    5. Eneutral
  2. 2Which of the following is false?
    1. AEvery atom of the same element has the same number of protons
    2. BThe periodic table lists elements in order of the number of protons in the nucleus.
    3. CDifferent elements can have the same number of protons.
    4. DIsotopes are atoms of the same element with the same number of protons and electrons but a different number of neutrons and different masses.
  3. 3[blank_start]Mass[blank_end] Number (Nucleon number) [blank_start]A[blank_end]
    = number of protons + number of [blank_start]neutrons[blank_end]
    [blank_start]Atomic[blank_end] number ([blank_start]Proton[blank_end] number) [blank_start]Z[blank_end]
    = number of protons
    1. AMass
    2. BA
    3. CAtomic
    4. DZ
    5. EX
    6. Fneutrons
    7. Gelectrons
    8. HProton
    9. IPositron
    10. JM
  4. 4Do different isotopes react differently?
    1. AYes
    2. BNo
  5. 5Isotopes.
    There may be differences in [blank_start]physical properties[blank_end] - with higher-mass isotopes of an element having a [blank_start]higher[blank_end] melting point, a [blank_start]higher[blank_end] boiling point and density - but [blank_start]chemical reactions[blank_end] are the same.
    1. Achemical reactions
    2. Bphysical properties
    3. Cappearance
    4. Dhigher
    5. Eequal
    6. Flower
    7. Ghigher
    8. Hlower
    9. Iequal
    10. Jappearance
    11. Kchemical reactions
    12. Lphysical properties
  6. 6What is an ion.
    1. AA charged species. The number of protons is different from the number of neutrons.
    2. BA charged species. The number of electrons is different from the number of protons.
    3. CAn uncharged species. The charges of subatomic particles balanced.
  7. 7Postive ions, or [blank_start]cations[blank_end], are atoms with [blank_start]fewer[blank_end] electrons than protons.
    Negative ions, or [blank_start]anions[blank_end], are atoms with more [blank_start]electrons[blank_end] than protons.
    1. Acations
    2. Bcathodes
    3. Cfewer
    4. Dmore
    5. Ean equal number of
    6. Fanions
    7. Gonions
    8. Helectrons
    9. Ineutrons
  8. 8Which of the following is false?
    1. ACarbon 12 is the international standard for the measurement of atomic masses
    2. BThe unit for the mass of subatomic particles is the atomic mass unit, u.
    3. CThe mass of one atomic mass unit is equal to 1 /12 th of the mass of carbon 14
  9. 9Relative isotopic mass is the mass of an [blank_start]isotope[blank_end] relative to 1/12th of the mass of an atom of [blank_start]carbon 12[blank_end].
    Relative atomic mass is the weighted mean mass of an [blank_start]atom[blank_end] of an element relative to 1/12th of the mass of an atom of [blank_start]carbon 12[blank_end].
    1. Aisotope
    2. Bcarbon 12
    3. Catom
    4. Dcarbon 12
  10. 10What is the charge of an ammonium ion?
    1. A+1
    2. B-1
    3. C0

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AS - Level Chemistry Test sobre Sin título, creado por Alice Butterworth el 10/06/2016.
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