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30 questions
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  • Q1

    The last entering electron in 19K and 20Ca  will have the same __

    B. l,  m, but different ms

    A. Fourth quantum number

    D. n, l, ms but different ml

    C.  n, l, ml but different ms

  • Q2

    Which of the following statements is correct for an electron that has the quantum numbers n=4 and ml=-2?

    C.    the electron is in the second principal shell

    D.   the electron must have a spin quantum number ms=+1/2

    A.   the electron may be in a p orbital

    B.    the electron may be in a d  orbital

  • Q3

    Identify the subshell in which electrons with the quantum numbers n=3,  l=2 may be found.

    C.   4d

    D.   3p

    A.   3d

    B.   4f

  • Q4

    The set of quantum numbers, n=4,  l=3,  ml=2 _____

    D.   describes one of seven orbitals of a similar type.

    C.   describes an electron in a 4d orbital.

    B.   is not allowed.

    A.   describes an electron in a 3p orbital.

  • Q5

    Which best describes ionic and covalent compounds?

    C.  Ionic and covalent compounds both form electrolytes.

    D.  Ionic and covalent compounds are both good conductor of electricity when dissolved in water.

    A.  Ionic compounds have lower melting point than covalent compounds.

    B.  Ionic compounds generally form solid crystals while covalent compounds do not.

  • Q6

    What type of bond is associated with compound that have the following characteristics: high melting point; its solution conduct electricity; normally it is crystalline solid at room temperature; can conduct electricity in its molten state.

    C.   Metallic

    A.   Ionic

    B.   Polar Covalent

    D.  Nonpolar Covalent

  • Q7

    What happens when an atom of a metal becomes ion?

    B.  The metal ion gains a negative charge.

    A.  The metal ion gains an electron.

    D.  the metal atom loses electrons.

    C.  The metal atom decreases in positive charge.

  • Q8

    How many valence electrons are transferred to nitrogen atom from potassium in the formation of the compound potassium nitride?

    A.  0

    C.  2

    B.  1

    D.  3

  • Q9

    Which of the following statements best explain the octet rule in the bonding of atoms?

    A.  Atoms undergo bonding by losing electrons.

    C.  Atoms bond to acquire the electron configuration of a noble gas.

    D.  Atoms undergo bonding by gaining or losing.

    B.  Atoms undergo bonding by losing electrons.

  • Q10

    What is the chemical formula of Aluminum oxide?

    C.  Al3O2

    D.  Al2O3

    A.  Al3O

    B.  AlO3

  • Q11

    What is the correct formula for dinitrogen pentoxide?

    B.  NO2

    A.  N4O

    D.  N2O2

    C.  N2O5

  • Q12

    Why are carbon atoms able to form many organic compounds?

    C.  Carbon atoms can form many types of bonds with other carbon

    A.  Carbon atoms have strong attraction to metal elements.

    B.  Carbon atoms attract electrons from other atoms.

    D.   Carbon atoms have strong attraction to nonmetals.

  • Q13

    Which is an organic compound?

    B.   CS2

    D.   C3H8

    A.   NaCl

    C.  NaHCO3

  • Q14

    Organic compound generally ___ 

    D.  melt at relatively high temperatures.

    C.  are strong electrolytes.

    B.   dissolve in nonpolar solvents

    A.  react rapidly

  • Q15

    What class of organic compound is C20H38?

    D.  Ketone

    A.  Alkene

    C.  Alkane

    B.  Alkyne


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