They are called carcinogens
Answer:
young plains called maria and are composed of basalt
Explanation:
Answer:
The Persian Gulf and the Tigris and Euphrates
Explanation:
Answer: four.
Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms
