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Science 9 Q2 Summative Test / Post Test

Quiz by Mary Grace Masongsong

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40 questions
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  • Q1

    The spin quantum number of an electron can be thought of as describing

    the direction of electron spin.

    the electron's exact location in orbit

    whether the electron's charge is positive or negative.

    the number of revolutions the electron makes about the nucleus per second

    30s
  • Q2

    How many electrons from the outermost shell does a 4s orbital possess?

    3

    5

    2

    4

    30s
  • Q3

    Which set of quantum numbers uniquely defines one of the electrons in an atomic orbital with n = 2 and l = 0?

    n = 2, l = 0, ml = 1, ms = +1

    n = 2, l = 0, ml = 1, ms = +½

    n = 2, l = 0, ml = 0, ms = +1

    n = 2, l = 0, ml = 0, ms = +½

    30s
  • Q4

    What is the electron configuration for nitrogen, atomic number 7?

    1s22s2 2p1

    1s22s2 2p2 3s1

    1s22s2 2p3

    1s22s3 2p2

    30s
  • Q5

    Which of these d-orbitals contains both paired and unpaired electrons?

    Answer Image
    Answer Image
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    Answer Image
    30s
  • Q6

    Boron belongs to Group 13. How many valence electrons does Boron have?

    one

    three

    two

    four

    30s
  • Q7

    Non-polar covalent bonding involves the equal sharing of electrons between atoms to attain stability. Which of the following compounds will have non-polar covalent bonding?

    HCl

    O2

    NaCl

    CH4

    30s
  • Q8

    Electrical and thermal conductivity is one of the properties of compounds. Which of the following types of bonds will have a high electrical conductivity?

     polar covalent bond

     

    non-polarcovalent bond

    ionic bond

    covalent bond

    30s
  • Q9

    The following compounds are commonly found in nature or in our household. Which do you think will have the highest melting/boiling point if we are to subject those substances to heating?

    sodium chloride(NaCl)

    oxygen gas

    sucrose (sugar)

    dihydrogen monoxide(water)

    30s
  • Q10

    What happens to the electron of a metal element in ionic bonding forming a compound?

    none of the choices

    shared unequally with non-metal

    shared to a non-metal

    transferred to non-metal            

    30s
  • Q11

    Which best describes the position of the elements in the Periodic Table and its valence electrons?

    Noble Gases elements have seven valence electrons

    Elements on the same family or group have the same valence electrons

     Elements on the same period have the same valence electrons

    All metalloids have the same valence electrons

    30s
  • Q12

    Which best describes an anion?

    It has a neutral charge.

    It has more neutrons than protons.

    It has more electrons than protons.

     It has more protons than electrons.

    30s
  • Q13

    Fluorine belongs to Group 17 or halogens. How many electrons does a Fluorine ion need for it to be stable?

    2

    1

    4

    3

    30s
  • Q14

    What can be combined with oxygen ions to form an ionic compound?

    Carbon ion

    Fluorine ion

    Calcium ion

    Chlorine ion

    30s
  • Q15

    Which of the following ions is a monoatomic ion?

    CN

    NH4

    Co2+

    Cr2O72–

    30s

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