Answer:
d) They're studying something for which they cant do an experiment
Explanation:
A. NO2 because the elements are both nonmetals.
The formula for hydrogen-hydrogen is H-H
Answer: The inner planets have common types of rocky land forms such as mountains and volcanoes.
Explanation: Helpteaching can give you an answer key to the quiz your working on also i took the test and got it right :)
