14) the formula k2s indicates that
a) the potassium ion is twice the size of the sulfide ion
b) sulfur and potassium form a covalent bond
c) there are two potassium ions for each ion of sulfur
d) there are two sulfur ions for each ion of potassium
15) fluorine, f, forms a binary ionic compound with lithium li. what is the name of this compound?
a) fluorine lithide
b) lithium fluoride
c)lithium fluorine
d) fluorine lithium
16) the standard on which the atomic mass unit is based is the mass of a
a) proton
b) neutron
c) chlorine-35 atom
d) carbon-12 atom
17)two highly reactive elements in period 2 are the metal lithium and
a) metalloid arsenic
b) nonmetal selenium
c) nonmetal fluorine
d)nonmetal krypton