Chemistry AS Chapter 2

1. 1The 3 subatomic particles are electron, protons and neutrons?

   1. AVerdadero
   2. BFalso
2. 2[blank_start]Electrons[blank_end] have the lowest relative masses. Scientists have to use relative masses because their weight is so [blank_start]small.[blank_end]

   1. AElectrons
   2. BProtons
   3. CNeutrons
   4. Dsmall
   5. Ebig
3. 3A proton doesn't have nearly the exact same relative mass as a neutron.

   1. AVerdadero
   2. BFalso
4. 4An electron has a [blank_start]negative[blank_end] charge.

   1. Anegative
   2. Bpositive
   3. Cno charge/neutral
5. 5Which subatomic particle has no charge or is considered neutral?

   1. Aproton
   2. Bneutron
6. 6The positive charge on a proton balances the electron negative charge.

   1. AVerdadero
   2. BFalso
7. 7An atoms mass is mostly in its [blank_start]nucleus[blank_end].

   1. Anucleus
   2. Bouter shells
   3. Cprotons
8. 8An atoms amount of electrons and protons can be different.

   1. AVerdadero
   2. BFalso
9. 9The overall charge of an atom is

   1. Anothing
   2. B+1
   3. CThe amount of electrons it has
10. 10The protons have an electrostatic [blank_start]repulsion[blank_end] between each other due to their positive charges. The [blank_start]neutrons[blank_end] act as a glue to hold the nucleus together.

    1. Aneutrons
    2. Brepulsion

11. 11Most atoms contain

    1. Aa similar or the same amount of protons than neutrons.
    2. Bthe same amount of protons and neutrons.
    3. CA different number of electrons and neutrons.
12. 12More neutrons are needed as the atom and nucleus gets bigger.

    1. AVerdadero
    2. BFalso
13. 13The number of [blank_start]protons[blank_end] identifies the atom.

    1. Aneutrons
    2. Belectrons
    3. Cprotons
14. 14What does the atomic number tell you?

    1. Aelectrons and protons
    2. Bprotons
    3. Cneutrons and electrons
    4. Dneutrons and protons
15. 15Atoms with a different number of [blank_start]neutrons[blank_end] are called isotopes.

    1. Aneutrons
16. 16Isotopes have different masses.

    1. AVerdadero
    2. BFalso
17. 17Atoms can't be made up of a mixture of isotopes.

    1. AVerdadero
    2. BFalso
18. 18Mass number is represented by the letter [blank_start]A[blank_end]

    1. AX
    2. BN
    3. CA
19. 19What is mass number?

    1. Athe number of neutrons
    2. Bthe number of electrons+protons
    3. Cnumber of protons+neutrons
20. 20Z is the notation for atomic number. It is the number of [blank_start]protons[blank_end].

    1. Aprotons
    2. Bneutrons
    3. Celectrons
21. 21How many neutrons does an isotope of 17-oxygen have with 8 protons? [blank_start]...[blank_end]

    1. A8
    2. B9
    3. C10
22. 22Different isotopes of the same element can act differently in reactions

    1. AVerdadero
    2. BFalso
23. 23What physical properties can differ between isotopes?

    1. Amelting and boiling points
    2. Bshape
    3. Cdensity
    4. Dstructure
24. 24A use of heavy water is to control reactions in a [blank_start]nuclear reactor.[blank_end]

    1. Anuclear reactor.
25. 25What makes heavy water heavy?

    1. AThe Hydrogen-1 iostope
    2. BThe Hydrogen-2 isotope
    3. CAn isotope of oxygen
    4. DIt has a higher relative mass
26. 26Heavy water is written as D20 and is called [blank_start]deuterium[blank_end]

    1. Adeuterium
27. 27What are the type of properties that are different between the heavy water and normal?[blank_start]...[blank_end]

    

    1. Aphysical
28. 28How many neutrons does tritium have? (an isotope of water)

    1. A3
    2. B2
    3. C1
29. 29The oxide tritium forms is called [blank_start]super heavy water[blank_end].

    1. Asuper heavy water
30. 30An ion is a charged atom.

    1. AVerdadero
    2. BFalso
31. 31The number of electrons and the same as the protons in an ion.

    1. AVerdadero
    2. BFalso
32. 32Positive ions are called [blank_start]cations[blank_end]. [blank_start]Negative ions[blank_end] are called anions.

    1. Acations
    2. Banions
    3. CPositive ions
    4. DNegative ions
33. 33Cations have more electrons that protons.

    1. AVerdadero
    2. BFalso
34. 34Work out with the protons, neutrons and electrons the charge of Chlorine.

    

    1. A+1
    2. B-2
    3. C-1
35. 35There is a strong nuclear force that holds together protons and neutrons which causes them to lose a fraction of their mass.

    1. AVerdadero
    2. BFalso
36. 36To work out the relative masses of isotopes, they are compared to the international measurement which is [blank_start]carbon-12[blank_end].

    1. Acarbon-12
37. 37The atomic mass unit is [blank_start]u[blank_end].

    1. Au
38. 381u (atomic mass units) is the mass of a proton or neutron.

    1. AVerdadero
    2. BFalso
39. 39Relative isotopic mass is the mass of an isotope relative to [blank_start]1/12th of the mass of an atom of carbon[blank_end]-12.

    1. A1/12th of the mass of an atom of carbon
40. 40Are these values true or false?

    

    1. AVerdadero
    2. BFalso
41. 41You can assume relative isotopic mass is the same as the [blank_start]mass number[blank_end] of the isotope.

    1. Amass number
42. 42Relative atomic mass is the [blank_start]weighted mean mass of a atom[blank_end] relative to 1/12th of the mass of an atom of carbon-12.

    1. Aweighted mean mass of a atom
43. 43The symbol for relative atomic mass is Ar.

    1. AVerdadero
    2. BFalso
44. 44The weighted mean mass takes account of:

    1. ATh percentage abundance of each isotope.
    2. BThe relative isotopic mass of each isotope.
45. 45The piece of equipment used to find the percentage abundance of isotopes is called a [blank_start]mass spectrometer[blank_end].

    1. Amass spectrometer
46. 46The difference is relative isotopic mass and relative atomic mass is...

    1. Aatomic mass isn't to do with isotopes.
    2. Bisotopic mass doesn't take into account abundance but atomic does.
47. 47Cl-35 and Cl-37 are isotopes of chlorine. Cl-35 is found in 75% but Cl-37 is found in 25%.

    1. ARelative isotopic mass is: 35 and 37
    2. BRelative isotopic mass is 35.5
    3. CRelative atomic mass is 35.5
    4. DRelative atomic mass is 36
48. 48The second stage of the mass spectrometer is accelerating the ions meaning heavier ions move more slowly and deflect less that lighter ions causing the ions to separate.

    1. AVerdadero
    2. BFalso
49. 49What is the ratio used to detect ions on a mass spectrometer?[blank_start]..[blank_end]

    1. Amass to charge ratio
50. 50The first 2 stages of the mass spectrometer are: place the sample on the mass spectrum, vaporise then ionise the sample to form cations.

    1. AVerdadero
    2. BFalso
51. 51If an ion has one positive charge, the ratio is equivalent to the relative isotopic mass.

    1. AVerdadero
    2. BFalso
52. 52You can show the mass/charge ratio against the percentage abundance using a [blank_start]graph[blank_end].

    

    1. Agraph
53. 53Work out this question to 2.d.p. [blank_start]...[blank_end]

    

    1. A20.18
54. 54Isotopic abundances can differ from where it is from.

    1. AVerdadero
    2. BFalso
55. 55Do question a for Br-11:[blank_start]...[blank_end]

    

    1. A80%
56. 56Atoms on the left side of the periodic table (metals) [blank_start]lose[blank_end] electrons to form cations.

    1. Alose
57. 57Transition metals can form different ions with different charges.

    1. AVerdadero
    2. BFalso
58. 58A binary compound contains two [blank_start]elements[blank_end] only.

    1. Aelements
59. 59To name a binary compound you can use the name of the [blank_start]first[blank_end] element. You then change the ending of the other element to [blank_start]ide[blank_end].

    1. Asecond
    2. Bfirst
    3. Cnon-metal
    4. Dide
    5. Eent
    6. Fde
60. 60The charge on a Zn ion is [blank_start]..[blank_end]

    1. A1+
    2. B2+
    3. C1-
61. 61The charge on an argon ion (Ag) is +2

    1. AVerdadero
    2. BFalso
62. 62Ions that contain more than one element bonded together are called [blank_start]polyatomic[blank_end].

    1. Apolyatomic
63. 63Which of these compounds have a 2- charge when they become an ion?

    1. ACO3
    2. BNO3
    3. CCr2O7
    4. DSO3
    5. ESO4
64. 64ites have one less oxygen than ates.

    1. AVerdadero
    2. BFalso
65. 65The charge on a phosphate (PO4) [blank_start]...[blank_end]

    1. A3-
66. 66The charge on ammounium (NH4) is

    1. A1+
    2. B2+
    3. C1-
67. 67Hydrogencarbonate (HCO3) and Manganate (Vll) (MnO4) both have a 2- charge.

    1. AVerdadero
    2. BFalso
68. 68If the formula is correct, the overall charge is 0.

    1. AVerdadero
    2. BFalso
69. 69You place the small numbers on the right of the element/compound to balance the [blank_start]charges[blank_end].

    1. Acharges
70. 70What is the formula of aluminium sulphate which contains 2Al 3+ and 3SO4 2- ions?[blank_start]..[blank_end]

    1. AAl2(SO4)3
71. 71A few elements can exist as small molecules.

    1. AVerdadero
    2. BFalso
72. 72[blank_start]Diatomic[blank_end] molecules are 2 atoms bonded together e.g. H2, N2

    1. ADiatomic
73. 73The 2 other elements that exist as molecules apart from diatomic molecules are [blank_start]P4[blank_end] and S8.

    1. AP4
74. 74Covalent compounds can contain ions.

    1. AVerdadero
    2. BFalso
75. 75the formula unit is the formula worked out from ionic charges in equations.

    1. AVerdadero
    2. BFalso
76. 76The state symbols are ([blank_start]g[blank_end]),(l),(s) and ([blank_start]aq[blank_end])

    1. Ag
    2. Baq
77. 77The big numbers in front of the element/compound are for [blank_start]balancing[blank_end] the equation.

    1. Abalancing
78. 78Balance this equation:[blank_start]..[blank_end]

    

    1. A4NH3 (g) + 5O2 (aq) -> 4NO(aq) + 6H20 (l

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Test sobre Chemistry AS Chapter 2, creado por emilycoral el 26/12/2015.

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