Answer:
4
Explanation:
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.
Answer:
carbondioxide last in about 300 to a 1000 years in the atmosphere
Answer:
A) Drilling Ship
Explanation:
This option makes sense because this is used for drilling, not necessarily studying the deep ocean.
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Answer:
Moving the bodies closer together increased the gravitational attraction and decreased the orbital period.
Explanation:
edmentum