Covalent & Ionic Bonding, Electronegativity Quiz

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Covalent & Ionic Bonding, Electronegativity Quiz - Quiz

Covalent & Ionic Bonding, Electronegativity Flash Quiz


Questions and Answers
  • 1. 

    Choose the statement that best explains: Why do hydrogen atoms usually exist as molecules, H2?

    • A.

      Hydrogen has an atomic number of one and is unsatisfied when the outermost orbital is unfilled. A hydrogen molecule of two hydrogen atoms is more stable than two individual hydrogen atoms

    • B.

      Hydrogen has an atomic number of two and does not need to share

    • C.

      Hydrogen usually combines with other atoms to form covalent bonds

    • D.

      Hydrogen has one proton and is in search of one neutron

    Correct Answer
    A. Hydrogen has an atomic number of one and is unsatisfied when the outermost orbital is unfilled. A hydrogen molecule of two hydrogen atoms is more stable than two individual hydrogen atoms
    Explanation
    Hydrogen atoms usually exist as molecules, H2, because hydrogen has an atomic number of one and is unsatisfied when the outermost orbital is unfilled. A hydrogen molecule of two hydrogen atoms is more stable than two individual hydrogen atoms because it allows both atoms to have a filled outermost orbital through the sharing of electrons. This sharing of electrons forms a covalent bond between the two hydrogen atoms, making the molecule more stable.

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  • 2. 

    What is a valence electron?

    • A.

      Electrons in the outer cloud of an atom

    • B.

      A negatively charge ion

    • C.

      A positively charge ion

    • D.

      Ionically bonded electrons

    Correct Answer
    A. Electrons in the outer cloud of an atom
    Explanation
    Valence electrons are the electrons located in the outermost energy level or electron cloud of an atom. These electrons play a crucial role in chemical bonding and determining the reactivity of an atom. They are involved in the formation of chemical bonds with other atoms, either by sharing or transferring electrons, to achieve a stable electron configuration. Therefore, the correct answer is "Electrons in the outer cloud of an atom."

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  • 3. 

    What is electronegativity?

    • A.

      How many electrons are in a valence.

    • B.

      The strength of an atoms' electrons.

    • C.

      The electrical charge of a polar molecule.

    • D.

      The exchange of electrons in ionic bonding.

    Correct Answer
    B. The strength of an atoms' electrons.
    Explanation
    Electronegativity refers to the ability of an atom to attract electrons towards itself in a chemical bond. It is a measure of the strength of an atom's electrons. Electronegativity values help determine the polarity of a bond and the distribution of electrons between atoms. Therefore, the given answer accurately describes electronegativity as the strength of an atom's electrons.

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  • 4. 

    This diagram represents H2.  What does the Hsymbol mean?

    • A.

      The H2 symbol represents two atoms of Hydrogen.

    • B.

      The H2 symbol represents a Hydrogen atom.

    • C.

      The H2 symbol represents a water molecule.

    • D.

      The H2 symbol represents an ionic bond.

    Correct Answer
    A. The H2 symbol represents two atoms of Hydrogen.
    Explanation
    The correct answer is that the H2 symbol represents two atoms of Hydrogen. This is because the subscript "2" indicates that there are two atoms of Hydrogen bonded together.

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  • 5. 

    In this diagram, the e- represents:

    • A.

      The e- represents the covalent Hydrogen electrons in this Hydrogen molecule.

    • B.

      The pair of e- represents the double covalent Hydrogen electrons in the Hydrogen molecule.

    • C.

      The pair of e- represents the ionic Hydrogen electrons in this Hydrogen molecule.

    • D.

      The e- represents the single shared Hydrogen electron in this Hydrogen molecule.

    Correct Answer
    A. The e- represents the covalent Hydrogen electrons in this Hydrogen molecule.
  • 6. 

    Why are Hydrogen covalent bonds non-polar?

    • A.

      Hydrogen bonds are non-polar because electrons in the bonds between identical atoms (H-H) are shared uniformly. This means electrons spend equal amounts of time around each atomic center.

    • B.

      Hydrogen bonds are non-polar because protons in the bonds between identical atoms (H-H) are shared uniformly. This means electrons spend equal amounts of time around each atomic center.

    • C.

      Hydrogen bonds are non-polar because protons in the bonds between identical atoms (H-H) are not shared uniformly. This means electrons do not spend equal amounts of time around each atomic center.

    • D.

      Hydrogen bonds are non-polar because protons and electrons in the atom of identical atoms (H-H) are shared uniformly. This means electrons do not spend equal amounts of time around each atomic center.

    Correct Answer
    A. Hydrogen bonds are non-polar because electrons in the bonds between identical atoms (H-H) are shared uniformly. This means electrons spend equal amounts of time around each atomic center.
    Explanation
    Hydrogen covalent bonds are non-polar because electrons in the bonds between identical atoms (H-H) are shared uniformly. This means that the electrons spend equal amounts of time around each atomic center, resulting in a symmetrical distribution of charge. As a result, there is no separation of positive and negative charges, making the bond non-polar.

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  • 7. 

    Identify the statement that is correct about the number of protons and electrons in an atom:

    • A.

      The number of protons and the number of electrons in an atom are always equal.

    • B.

      The number of protons is always greater than the number of electrons in an atom.

    • C.

      The number of protons is always less than the number of electrons in an atom.

    • D.

      The number of protons and electrons equals the mass of an atom.

    Correct Answer
    A. The number of protons and the number of electrons in an atom are always equal.
    Explanation
    The statement that is correct about the number of protons and electrons in an atom is that the number of protons and the number of electrons in an atom are always equal. This is because the atomic number of an element, which is the number of protons in its nucleus, determines its identity. In a neutral atom, the number of protons is equal to the number of electrons, as the positive charge of the protons is balanced by the negative charge of the electrons.

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  • 8. 

    What is an ion?

    • A.

      An ion is an atom that has been charged due to the loss or gain of electrons.

    • B.

      An ion is an electronegative charge.

    • C.

      An ion is a positively or negatively charged atom.

    • D.

      An ion is a neutral atom.

    Correct Answer
    A. An ion is an atom that has been charged due to the loss or gain of electrons.
    Explanation
    An ion is an atom that has been charged due to the loss or gain of electrons. When an atom loses or gains electrons, it becomes positively or negatively charged, respectively. This charge imbalance is what defines an ion. So, an ion is not a neutral atom, as it has a charge. It is also not simply an electronegative charge, as ions can be either positively or negatively charged depending on whether they have gained or lost electrons.

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  • 9. 

    How are covalent and ionic bonds different?

    • A.

      Covalent bonds share electrons in the valence. Ionic bonds are formed when one atom loses an electron and it becomes a positive ion and the atom that gains the electron becomes a negatively charged ion because it has gained an electron.

    • B.

      Covalent bonds are formed when one atom loses an electron and it becomes a positive ion and the atom that gains the electron becomes a negatively charged ion because it has gained an electron. Ionic bonds share electrons in the valence.

    • C.

      Covalent bonds have a neutral electronegativity. Ionic bonds create anions.

    • D.

      Covalent bonds make new elements. Ionic bonds create cations and anions.

    Correct Answer
    A. Covalent bonds share electrons in the valence. Ionic bonds are formed when one atom loses an electron and it becomes a positive ion and the atom that gains the electron becomes a negatively charged ion because it has gained an electron.
    Explanation
    Covalent bonds involve the sharing of electrons between atoms in their valence shells, while ionic bonds are formed through the transfer of electrons, resulting in the formation of positively and negatively charged ions. In covalent bonds, there is no net charge on the atoms involved, while in ionic bonds, one atom loses an electron to become positively charged (cation) and another atom gains the electron to become negatively charged (anion). This distinction between sharing and transferring of electrons is the key difference between covalent and ionic bonds.

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  • 10. 

    Which is the correct explanation for how table salt, Na+Cl-, ionically bonds?

    • A.

      The strong electron attraction that causes the pairing of a loss and a gain is the ionic bond. Sodium (Na) has 11 electrons with 1 valance electron. Chlorine (Cl) has 17 electrons with 7 in its valence outer orbit. If Sodium looses its valance electron, its next shell will be full (with 8 electrons). That would make Sodium a positive ion. If Chlorine gains that 1 valance electron, its shell would be full with a maximum of 8 electrons, and it would then be a negative ion.

    • B.

      The uneven electron attraction that causes the pairing of a loss and a gain is the ionic bond. Sodium (Na) has 17 electrons with 7 in its outer orbit. Chlorine has 11 electrons with 1 valance electron. If Sodium gains one electron it fills it’s valance and is a negative ion. If Chlorine looses 1 electron to Sodium, its next shell is full with 8 electrons and it becomes a positive ion.

    • C.

      The attraction balance of electrons causes ionic bonding. Sodium (Na) has 8 electrons with 6 in its outer orbit. Chlorine has 12 electrons with 2 in its outer orbit. If Sodium gains two electrons it fills it’s valance and is a negative ion. If Chlorine looses 2 electrons to Sodium, it's next shell is full with 8 electrons and becomes a positive ion.

    • D.

      An ionic bond occurs whenever an atom with s low electronegativity pairs with an atom of a higher electronegativity. Sodium has a strong electronegativity and Chlorine does not, so they can form an ionic bond.

    Correct Answer
    A. The strong electron attraction that causes the pairing of a loss and a gain is the ionic bond. Sodium (Na) has 11 electrons with 1 valance electron. Chlorine (Cl) has 17 electrons with 7 in its valence outer orbit. If Sodium looses its valance electron, its next shell will be full (with 8 electrons). That would make Sodium a positive ion. If Chlorine gains that 1 valance electron, its shell would be full with a maximum of 8 electrons, and it would then be a negative ion.

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  • Feb 23, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 03, 2014
    Quiz Created by
    Rhaveno
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