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Science 10-PRETEST-Q2

Quiz by JOCELLE VISTAL

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40 questions
Show answers
  • Q1

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

    the electron's exact location in orbit.

    the direction of electron spin.

    whether the electron's charge is positive or negative.

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

    30s
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  • Q2

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

    2

    5

    4

    3

    30s
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  • 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 = +½

    n = 2, l = 0, ml = 0, ms = +½

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

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

    30s
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  • Q4

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

    1s2 2s2 2p1

    1s2 2s2 2p2 3s1

    1s2 2s3 2p2

    1s2 2s2 2p3

    30s
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  • Q5

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

    Answer Image
    Answer Image
    Answer Image
    Answer Image
    30s
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  • Q6

    How many valence electrons does Boron have?

    one

    four

    two

    three

    30s
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  • Q7

    Covalent and ionic bonding produce certain types of compounds that have different properties. What is the general term used for all the compounds with the covalent bonds?

    compound         

    molecule

    none of the choices

    atom

    30s
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  • Q8

    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?

    NaCl                                 

    O2

    CH4        

    HCl

    30s
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  • Q9

    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

    ionic bond

    covalent bond

    non-polar covalent bond

    30s
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  • Q10

    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?

    dihydrogen monoxide (water)

    sucrose(sugar)

    sodium chloride (NaCl)

    oxygen gas

    30s
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  • Q11

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

    shared to a non-metal  

    shared unequally with non-metal

    none of the choices

    transferred to non-metal

    30s
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  • Q12

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

     All metalloids have the same valence electrons

    Elements on the same period have the same valence electrons

    Noble Gases elements have seven valence electrons

    Elements on the same family have the same valence electrons

    30s
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  • Q13

    Which best describes an anion?

    It has more electrons than protons.

    It has more neutrons than protons.

    It has a neutral charge.

    It has more protons than electrons.

    30s
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  • Q14

    How many electrons does a Fluorine ion need for it to be stable?

    4

    1

    3

    2

    30s
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  • Q15

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

    Calcium ion

    Chlorine ion

    Carbon ion

    Fluorine ion

    30s
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  • Q16

    Which of the following LED symbols best describe the anion present in the given statement?

    Answer Image
    Answer Image
    Answer Image
    Answer Image
    30s
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  • Q17

    Which of the following ions is classified as polyatomic cation?

    Co2+

    CN

    Cr2O72–

    NH4  

    30s
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  • Q18

    As you pour the motor oil into the machine, you notice that the flow is somewhat thick and sticky as compared to water. What property best describes this scenario?

    Motor oil has a low viscosity.

    Motor oil has high viscosity.

    Motor oil has low volatility.

    Motor oil has high volatility.

    30s
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  • Q19

    What atom is most likely to form as an inorganic compound when it is bonded with a Carbon atom?

    Hydrogen atom               

    Sodium atoms

    Carbon atom     

    Oxygen atom

    30s
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  • Q20

    Which of the following compounds is classified as organic compounds?

    CBr4      

    CO2

    C3H8

    CaCO3

    30s
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