Which pair will most likely form a covalent bond? a. c and h b. k and n?

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus.b) the number of neutrons it contains in its nucleus.c) the number of protons it has in a cloud around the nucleus.d) the number of neutrons it has in a cloud around the nucleus.e) the number of electrons it exchanges with its neighbors.

Give one example of a pure (exact) number and of an estimated (measured) number.