Chemical Bonding Quiz – Flashcards

What determines the number of covalent bonds formed by an atom? a) Electrons in the outer valence shell of the atom b) Electrons in each orbital of the atom c) Orbitals found in the atom d) Valence shells in the atom

What is the correct molecular formula for caffeine (shown here)? a) C8H10N4O2 b) C8H9N4O2 c) C3H9N4O2 d) C3H10N4O2

A covalent chemical bond is one in which: a) Protons or neutrons are shared by two atoms so as to satisfy the requirements of both. b) Electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged c) Outer shell electrons are shared by two atoms so as to satisfactorily fill the outer electron shells of both. d) Outer shell electrons of one atom are transferred to the inner electron shells of another atom.

A shared pair of electrons is called a: _________. a) covalent bond b) hydrogen bond c) ionic bond d) polar bond

Will O2 form a polar covalent bond? Yes, because oxygen is very electronegative. Yes, because oxygen is not very electronegative. No because hydrogen is needed to form polar covalent bonds No, because both atoms are equally electronegative.

Will a polar covalent bond form between the two nitrogen atoms in nitrogen gas (N2)? a) Yes, because nitrogen is very electronegative. b) No because both atoms are equally electronegative. c) Yes, because nitrogen is not very electronegative. d) No because hydrogen is needed to form polar covalent bonds.

What do the four elements most abundant in life - carbon, oxygen, hydrogen and nitrogen - have in common? a) They are elements produced only in living cells. b) They all have unpaired electrons in their valence shells. c) They all have the same number of valence electrons. d) Each element exists in only one isotopic form.

Table salt is composed of Na+ and Cl- to form NaCl. This type of bond is called: _____________. a) Hydrogen b) Covalent c) Ionic d) Polar

A double covalent bond is the sharing of a total of how many electrons? a) 2 b) 4 c) 6 d) 8

Which bond is the weakest? a) Covalent bonds b) Hydrogen bonds c) Ionic bonds d All 3 of these bonds are approximately the same strength.