Which of these is not characteristic of carbon? a. forms four covalent bonds b. bonds with itself c. forms long chains d. is sometimes ionic?

The correct answer is d.

C has four valence electrons. To become an ion with a complete valence shell, it would have to

Thus, carbon is extremely unlikely to form ionic compounds.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

elements make up everything, and they combine to make compounds.

the answer is c