Which of the following is(are) classified as true chemical bonds?
a. hydrogen only
b. ionic only
c. covalent only
d. both ionic and covalent
e. hydrogen, ionic and covalent
Question 2
Coronae on Venus are believed to be
a. impact craters.
b. caused by rising convection currents in the interior of Venus.
c. the result of plate tectonics.
d. located only in the polar regions of Venus.
e. much older than the highlands such as Ishtar Terra.