Which pair of elements has atoms with the same number of valence electrons?
potassium (K) and bromine (Br)
potassium (K) and bromine (Br) - incorrect
indium (In) and lead (Pb)
indium (In) and lead (Pb) - no response given
astatine (At) and radon (Rn)
astatine (At) and radon (Rn) - no response given
silicon (Si) and germanium (Ge)
silicon (Si) and germanium (Ge) - no response given
The correct answer is: silicon (Si) and germanium (Ge)
How is electronegativity defined?
the overall negative charge on an atom
the overall negative charge on an atom
the overall number of negatively charged particles in an atom
the overall number of negatively charged particles in an atom
the tendency of an atom to give up electrons
the tendency of an atom to give up electrons
the tendency of an atom to attract electrons in a bond
the tendency of an atom to attract electrons in a bond
The correct answer is: the tendency of an atom to attract electrons in a bond
Carbon is in Group 4 on the periodic table. Does carbon typically form covalent or ionic bonds, and why?
It typically forms ionic bonds because it will give away four electrons in order to become stable.
It typically forms ionic bonds because it will give away four electrons in order to become stable.
It typically forms covalent bonds because it is a nonmetal, and nonmetals always form covalent bonds.
It typically forms covalent bonds because it is a nonmetal, and nonmetals always form covalent bonds.
It typically forms covalent bonds because it wants four more electrons to share in order to fill its outer shell.
It typically forms covalent bonds because it wants four more electrons to share in order to fill its outer shell.
It typically forms ionic bonds because it is a nonmetal and will bond with a metal.
The correct answer is: It typically forms covalent bonds because it wants four more electrons to share in order to fill its outer shell.
Carbon is an essential atom in many organic molecules. Why is it so useful?
It has a half-full outer shell of electrons, allowing it to form a wide variety of bonds.
It has a half-full outer shell of electrons, allowing it to form a wide variety of bonds.
It has a full outer shell of electrons, so it does not need electrons from other atoms.
It has a full outer shell of electrons, so it does not need electrons from other atoms.
It has an empty outer shell of electrons, allowing it to accept electrons from a larger number of atoms.
It has an empty outer shell of electrons, allowing it to accept electrons from a larger number of atoms.
It has an almost full outer shell of electrons, meaning that it is has a greater tendency to bond with other atoms