C. The mass number is the amount of Protons and electrons there are combined, so 200 - 80 is 120.
Answer:
True
Explanation:
Depends of the size and comparison
Answer:
The higher concentrations of greenhouse gases—and carbon dioxide in particular—is causing extra heat to be trapped and global temperatures to rise.
Answers:
______________________________________________
1) [D]: " CO₂ " .
<u>Note:</u><u> </u> This is the only answer choice given that is composed of: "at least two different elements" .
_______________________________________________
2) [D]: "carbon and hydrogen" {"C" and "H" .} .
_______________________________________________
The answer is c it was 1510 is 1950 and in 1990 it was 16000
